Billing & Invoicing Software for Windows

XP, 7, 8, 10 Compatible | Best Free & Open Source
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129 apps

Bill4Time   

86
Cloud-based time billing software
Fast and easy client billing ensures that you aren't spending your valuable time doing back office work. With flexible billing methods with hourly and flat fee. Read more about Bill4Time
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Cloud-based time billing software
Fast and easy client billing ensures that you aren't spending your valuable time doing back office work. With flexible billing methods with hourly and flat fee. Read more about Bill4Time
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Tipalti AP Automation   

51
Global Payables Automation
Tipalti automates invoice collection, PO matching, and approval processes electronically while also streamlining the entire global payables operation. Read more about Tipalti AP Automation
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Global Payables Automation
Tipalti automates invoice collection, PO matching, and approval processes electronically while also streamlining the entire global payables operation. Read more about Tipalti AP Automation
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BigTime   

472
Time, billing, expense, and project management software
As an official Intuit-Integrated Application, BigTime was designed to sync seamlessly with all QuickBooks versions. BigTime unifies budgeting, project planning/execution, team communication, task management, resource management, invoicing and project financials. Read more about BigTime
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Time, billing, expense, and project management software
As an official Intuit-Integrated Application, BigTime was designed to sync seamlessly with all QuickBooks versions. BigTime unifies budgeting, project planning/execution, team communication, task management, resource management, invoicing and project financials. Read more about BigTime
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FreshBooks   

3,219
Cloud Accounting Software for Small Business Owners
FreshBooks lets you create, send & track invoices, as well as create expenses, send late payment reminders and account statements, and set up recurring billing. Read more about FreshBooks
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Cloud Accounting Software for Small Business Owners
FreshBooks lets you create, send & track invoices, as well as create expenses, send late payment reminders and account statements, and set up recurring billing. Read more about FreshBooks
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TimeSolv   

490
Practice your passion. Ours is billing and timekeeping.
Solution for lawyers & other professional firms • Proven time and billing solution since 1999 • Narrative replacement codes for quickly entering frequently used descriptions • Multiple timers to concurrently manage time on multiple matters • Conflicts management to easily search for related parties • Trust Accounts for managing third party accounts… Read more about TimeSolv• Activities coded with UTBMS (Uniform Task-Based Management System) Free 30-day trial with no credit card number required. Free support and training available.
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Practice your passion. Ours is billing and timekeeping.
Solution for lawyers & other professional firms • Proven time and billing solution since 1999 • Narrative replacement codes for quickly entering frequently used descriptions • Multiple timers to concurrently manage time on multiple matters • Conflicts management to easily search for related parties • Trust Accounts for managing third party accounts… Read more about TimeSolv• Activities coded with UTBMS (Uniform Task-Based Management System) Free 30-day trial with no credit card number required. Free support and training available.
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Accelo   

133
Automation software for all Professional Service Businesses
Easily bill clients and create invoices directly from projects, service issues, contracts, and timesheets. Accelo features automatic time capturing to record the time you spent on projects and tasks, eliminating the need to worry about untracked time, so you know exactly how much to bill clients. Read more about Accelo
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Automation software for all Professional Service Businesses
Easily bill clients and create invoices directly from projects, service issues, contracts, and timesheets. Accelo features automatic time capturing to record the time you spent on projects and tasks, eliminating the need to worry about untracked time, so you know exactly how much to bill clients. Read more about Accelo
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ZarMoney   

19
Cloud-based accounting solution for businesses of all sizes
ZarMoney is a cloud-based accounting solution designed to assist businesses of all sizes with the management of inventory and finances. Key features include team collaboration, quote generation, invoicing, transaction tracking, remote access, and approval workflows. Read more about ZarMoney
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Cloud-based accounting solution for businesses of all sizes
ZarMoney is a cloud-based accounting solution designed to assist businesses of all sizes with the management of inventory and finances. Key features include team collaboration, quote generation, invoicing, transaction tracking, remote access, and approval workflows. Read more about ZarMoney
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Odoo   

369
Full Suite of Integrated Business Apps
Easily manage recurring billing, subscribers, sales, and more with Odoo’s automated tools. Quickly provide clear contracts and flawless, automated invoices; take care of taxes without stress; and handle payments - all done automatically according to your settings. Read more about Odoo
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Full Suite of Integrated Business Apps
Easily manage recurring billing, subscribers, sales, and more with Odoo’s automated tools. Quickly provide clear contracts and flawless, automated invoices; take care of taxes without stress; and handle payments - all done automatically according to your settings. Read more about Odoo
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Ecount ERP   

35
100% Cloud-based ERP for small & mid-sized businesses.
Ecount ERP is a fully integrated, web-based accounting, inventory, sales, purchasing and production management software for small and mid-sized businesses. The enterprise resource planning (ERP) tool allows users to manage all aspects of their business, both front and back office, from one platform. Read more about Ecount ERP
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100% Cloud-based ERP for small & mid-sized businesses.
Ecount ERP is a fully integrated, web-based accounting, inventory, sales, purchasing and production management software for small and mid-sized businesses. The enterprise resource planning (ERP) tool allows users to manage all aspects of their business, both front and back office, from one platform. Read more about Ecount ERP
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QT9 ERP   

0
Windows-based enterprise resource planning software
QT9 ERP helps businesses manage accounting, purchases, sales, inventory, production, payments, and more. The MRP planning functionality lets users monitor raw material based on processed orders, facilitating planning of purchasing activities and automating purchase orders (PO) creation. Read more about QT9 ERP
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Windows-based enterprise resource planning software
QT9 ERP helps businesses manage accounting, purchases, sales, inventory, production, payments, and more. The MRP planning functionality lets users monitor raw material based on processed orders, facilitating planning of purchasing activities and automating purchase orders (PO) creation. Read more about QT9 ERP
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RazorSync   

440
Field Service Management Software & Mobile App
RazorSync allows field technicians to create quotes, work orders, & invoices, capture signatures, update inventory & QuickBooks, all from the job site. Read more about RazorSync
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Field Service Management Software & Mobile App
RazorSync allows field technicians to create quotes, work orders, & invoices, capture signatures, update inventory & QuickBooks, all from the job site. Read more about RazorSync
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vcita   

170
vcita: Build a business you’re proud of.
Create and email branded invoices and track your business income with a centralized dashboard. Let clients pay for your services online, accept any credit card. Read more about vcita
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vcita: Build a business you’re proud of.
Create and email branded invoices and track your business income with a centralized dashboard. Let clients pay for your services online, accept any credit card. Read more about vcita
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TrackTik   

74
Security Workforce Management Software
https://www.tracktik.com/back-office-suite/contracts-invoicing/ Read more about TrackTik
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Security Workforce Management Software
https://www.tracktik.com/back-office-suite/contracts-invoicing/ Read more about TrackTik
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Bitrix24   

416
100% free CRM, collaboration and communication tool suite
Bitrix24 is a free CRM that comes with unlimited free quotes and invoicing. Online payments (PayPal, Braintree, AuthorizeNet, Stripe, etc) are supported as well. Join 4 million businesses that use Bitrix24 free client management, time tracking, billing and invoicing platform. Read more about Bitrix24
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100% free CRM, collaboration and communication tool suite
Bitrix24 is a free CRM that comes with unlimited free quotes and invoicing. Online payments (PayPal, Braintree, AuthorizeNet, Stripe, etc) are supported as well. Join 4 million businesses that use Bitrix24 free client management, time tracking, billing and invoicing platform. Read more about Bitrix24
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Virtuagym   

99
All-in-One Club Management Software
Virtuagym offers fitness software solutions to personal trainers, independent studios and gym chains of all sizes. Reduce administration time with our simple and secure billing solution designed for fitness businesses. Accept payments anywhere, from the front desk to online. Read more about Virtuagym
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All-in-One Club Management Software
Virtuagym offers fitness software solutions to personal trainers, independent studios and gym chains of all sizes. Reduce administration time with our simple and secure billing solution designed for fitness businesses. Accept payments anywhere, from the front desk to online. Read more about Virtuagym
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HarmonyPSA   

18
The next generation of professional services automation.
Straight-through-processing to invoices with automatic balance sheet accounting in the background. Full multi-currency support with consolidation reporting. Read more about HarmonyPSA
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The next generation of professional services automation.
Straight-through-processing to invoices with automatic balance sheet accounting in the background. Full multi-currency support with consolidation reporting. Read more about HarmonyPSA
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Housecall Pro  

2,379
Field Service Management App
For field service businesses of all sizes, HouseCall Pro provides simple billing and invoicing software that automates billing and saves you time and money. Read more about Housecall Pro
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Field Service Management App
For field service businesses of all sizes, HouseCall Pro provides simple billing and invoicing software that automates billing and saves you time and money. Read more about Housecall Pro
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Clio  

1,090
Cloud-based legal case management software
Legal billing software that gives you sleek, customizable invoices. Generating a bill and receiving payment with Clio is quick and easy—and can be done online. Read more about Clio
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Cloud-based legal case management software
Legal billing software that gives you sleek, customizable invoices. Generating a bill and receiving payment with Clio is quick and easy—and can be done online. Read more about Clio
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Time Tracker  

2,236
Track time for payroll, billing and productivity.
Time Tracker + Billing keeps all of your invoices and client payments in one place. It’s a complete time and billing suite, accessible anywhere. Read more about Time Tracker
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Track time for payroll, billing and productivity.
Time Tracker + Billing keeps all of your invoices and client payments in one place. It’s a complete time and billing suite, accessible anywhere. Read more about Time Tracker
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Timesheets.com  

639
Time Tracking for Payroll and Billing
Timesheets.com tracks time and expenses to produce reports and exports to software like QuickBooks for invoicing. Read more about Timesheets.com
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Time Tracking for Payroll and Billing
Timesheets.com tracks time and expenses to produce reports and exports to software like QuickBooks for invoicing. Read more about Timesheets.com
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TimeCamp  

495
Automatic time tracking software for SMBs
TimeCamp is a time tracking platform with which SMBs can track billable hours, generate automatic invoices & manage employee time & attendance. Read more about TimeCamp
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Automatic time tracking software for SMBs
TimeCamp is a time tracking platform with which SMBs can track billable hours, generate automatic invoices & manage employee time & attendance. Read more about TimeCamp
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CosmoLex  

287
Web Based Legal Practice Management & Accounting Software
CosmoLex legal timekeeping & billing software catches every billable item: meetings, tasks, even time on email & research. Get bills out in just one click. Read more about CosmoLex
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Web Based Legal Practice Management & Accounting Software
CosmoLex legal timekeeping & billing software catches every billable item: meetings, tasks, even time on email & research. Get bills out in just one click. Read more about CosmoLex
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ActiveCollab  

353
Make Real Work Happen!
ActiveCollab is equipped with just the right set of features to keep you free from distractions and focused on work: workload management, time tracking, task dependencies, invoicing, collaborative options, third-party integrations. Read more about ActiveCollab
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Make Real Work Happen!
ActiveCollab is equipped with just the right set of features to keep you free from distractions and focused on work: workload management, time tracking, task dependencies, invoicing, collaborative options, third-party integrations. Read more about ActiveCollab
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actiTIME  

86
Time Tracking Software
Set up billing rates, track worked hours and create 100% accurate PDF invoices for your clients. Control customers' performance with multiple reports. Read more about actiTIME
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Time Tracking Software
Set up billing rates, track worked hours and create 100% accurate PDF invoices for your clients. Control customers' performance with multiple reports. Read more about actiTIME
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Actionstep  

93
More headspace for what really matters
Actionstep has an exceptionally powerful billing and invoicing system which is unmatched by competitors. Read more about Actionstep
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More headspace for what really matters
Actionstep has an exceptionally powerful billing and invoicing system which is unmatched by competitors. Read more about Actionstep
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