PortaBase is a program for conveniently managing one-table database files. It can be used as a shopping list, media inventory, TODO list, address book, photo album and more. It is available for many platforms, including Linux, Mac OS X, Windows, and Maemo. Features include:

Wine is a free MS-Windows API implementation.

This is an open source, portable, and extendible system for the processing and editing of unstructured 3D triangular meshes. The system is aimed to help the processing of the typical not-so-small unstructured models arising in 3D scanning, providing a set of tools for editing, cleaning, healing, inspecting, rendering and converting this kind of meshes.

GMIDImonitor is GTK+ application that shows MIDI events.

Pytrainer is a desktop application for logging and graphing sporting activities such as running or cycling sessions. Data can be imported from GPS devices, files or input manually. Currently pytrainer supports GPX, TCX and FIT files.

Debconf is a configuration management system for debian packages. Packages use Debconf to ask questions when they are installed.