spectrwm is a minimalistic tiling window manager that tries to stay out of the way so that valuable screen real estate can be used for much more important stuff. It has sane defaults and does not require one to learn a language to do any configuration. It was written by hackers for hackers and it strives to be small, compact, and fast.
GCompris is an educational software suite with numerous activities for children aged 2 to 10. Some of the activities are game-orientated, but nonetheless still educational. These include computer discovery (keyboard, mouse, different mouse gestures), algebra (table memory, enumeration, double entry table, mirror image), science (the canal lock, the water cycle, the submarine, electric simulation), geography (place the country on the map), games (chess, memory, connect 4, oware, sudoku), reading practice, and others (learn to tell time, puzzles of famous paintings, vector drawing, cartoon making, etc.). It currently offers in excess of 100 activities, and more are being developed.
SkaDate is professional and fully customizable dating software with professional templates, apps, and forum and ticket support, in addition to free lifetime access to updates and version upgrades. It features close to a hundred features, multiple language support, an affiliate system, and an extensive member control panel.
The POP and IMAP troubleshooter serves to diagnose and solve connection problems from client machines to email services. It reads the client configuration files (Outlook, Windows Mail, Thunderbird, etc.), checks the individual settings, and then attempts to create POP, IMAP, and SMTP connections using these settings. The troubleshooter is coded in C++ using the Qt environment. It can be used generically, or can be customized for the demands of a particular email service.
X File Explorer (Xfe) is a filemanager for X. It is based on the popular, but discontinued, X Win Commander. Xfe is desktop independent and is written with the C++ Fox Toolkit. It looks similar to Windows Commander or MS-Explorer, and is very fast and simple. It features file associations, the ability to mount/umount devices, a directory tree for quickly changing directories, the ability to change file attributes, automatic registry saving, the ability to view/create/extract compressed archives, and much more.
Question2Answer is software for creating social Q&A sites that encourage your online community to share knowledge. It implements sites similar to Stack Overflow or Stack Exchange. It helps you create content that is very search engine (SEO) friendly. It can be installed in five minutes or less. Styling is easy with CSS themes. It has a fast integrated search engine. There is a points-based reputation management. Categories and tags can be used, with automatic completion. Email notifications and RSS are supported. Voting, comments, and follow-on questions are supported. The admin interface is simple and secure. Scaling to over 1,000,000 posts is possible. Built-in user account management or single sign-on for existing sites can be used.