Open Source C Accounting Software

GnuCash is a personal and small-business finance manager with a check-book like register GUI to enter and track bank accounts, stocks, income and expenses. GnuCash is designed to be simple and easy to use but still based on formal accounting principles.

Grisbi is a very functional personal financial management program with a reasonable set of homefinance features.

muhasebeci is a free accounting program. it is for all size firms.

Port of GRISBI a GPL accounting manager (http://www.grisbi.org/) under Windows. Depending of the GRISBI version the port should be done using CYGWIN or in a native way. You will found here all stuff needed to install, use and compile GRISBI under Windows

Billd is a complete open source billing system for ICRadius written in C. Includes billing daemon with support for variuos billing methods, support for pre-paid cards and administration tools for users management.

Your private financial manager.

UNIX billing system, for network servers, voip, etc.

Universal IP-traffic collector. Can gather data from Cisco IP Accounting / ipcad, Mikrotik, NSG, Revolution routers.

IceB is personal and corporate financial accounting (bookkeeping) software that can manage multiple accounts, multiple bases, and multiple users. It manages third parties, expenditures, and receipts categories, and also budgetary lines, financial years, and other. Support multiplatform - Linux/Unix and MS Windows (include Windows7)