Arora is a simple cross-platform Web browser whose feature list includes things like "History" and "Bookmarks". It has a small code base. It was originally created as a demo for Qt to help test the QtWebKit component and find API issues and bugs before the release. A very old version can still be found in Qt's source code in the demo/browser directory. Arora works on Linux, OS X, Windows, FreeBSD, and embedded Linux using Qt Embedded, and works anywhere else Qt does.
Artha is a handy thesaurus based on WordNet with distinct features like global hot key look up, passive desktop notification, regular expression based search, etc. Artha may be used as a free open-source replacement/clone to the proprietary WordWeb Pro thesaurus (which is also based on WordNet) on Unix-like and Windows operating systems.
AutoWallpaper is a cross-platform desktop wallpaper changing utility. It automatically (or manually) changes the desktop wallpaper at a specified time interval set by the user. It runs in the background with a system tray icon that is visible when the application is running. It is written in Visual C# .NET 2008 (Windows versions) and Qt 4.4.3/4.5.0 (Linux/others).
bscallmon is a small GUI tool that allows you to view the list of incoming and outgoing phone calls on routers running the BitSwitcher firmware without having to log into the router's Web interface. Features include a phone book, custom icons, unlimited call list size, and optional systray integration and call notification. It does not require compiling and runs on both Unix and Windows systems.