The systemd system and service manager
Personal and small-business finance manager
A universal instant messaging (IM) program
Free, easy, personal accounting for everyone
Remote anti spam utility
Accounting, invoicing, inventory and payroll software for Linux
A simple example to show the use of GnuCash C API
Outgoing email rate limiter
OpenSource high performance mail policy daemon for Postfi
Personal Password Manager
iceB - free and opensource accounting software for Linux and Windows
Berkeley DB NSS module