vfu is a nice file-manager using the ncurses or yascreen libraries. It has many nice features:

IIPImage is an advanced high-performance feature-rich imaging server system for web-based streamed viewing and zooming of ultra high-resolution images. It is designed to be fast and bandwidth-efficient with low processor and memory requirements. The system can comfortably handle gigapixel size images as well as advanced image features such as both 8 and 16 bit depths, CIELAB colorimetric images and scientific imagery such as multispectral images.

Olive is a console mode RSS newsreader. It provides a chronological rather than site-oriented view of news stories and tries to stay out of your way as much as possible.

Firebird is a relational database offering many ANSI SQL-99 features that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers excellent concurrency, high performance, and powerful language support for stored procedures and triggers. It has been used on production systems under a variety of names since 1981.

xmobar is a lightweight text-based status bar for X11 desktops written in Haskell and designed to work with (but not limited to) xmonad. It has a variety of plugins allowing the display of system-related data and an extensible architecture that makes it easy to write one's own plugins. xmobar supports displaying UTF-8 text and using TrueType fonts via Xft.

unicode is a simple command line utility that displays properties for a given unicode character, or searches unicode database for a given name.