IPython can be used as a replacement for the standard Python shell, or it can be used as a complete working environment for scientific computing (like Matlab or Mathematica) when paired with the standard Python scientific and numerical tools. It supports dynamic object introspections, numbered input/output prompts, a macro system, session logging, session restoring, complete system shell access, verbose and colored traceback reports, auto-parentheses, auto-quoting, and is embeddable in other Python programs.

Kapman is a clone of the well known game Pac-Man. You must go through the levels escaping ghosts in a maze. You lose a life when a ghost eats you, but you can eat the ghosts for a few seconds when eating an energizer. You win points when eating pills, energizers, and bonus, and you win one life for each 10,000 points. When you have eaten all the pills and energizers of a level, you go to the next level, and the player and ghost speeds increase.

gmusicbrowser is a powerful graphical browser which supports libraries with a very large number of songs (over 10,000).

Gnucash provides accounting functions suitable for use by small businesses and individuals. It can track finances in multiple accounts, keeping running and reconciled balances. There is support for customer, vendor and employee processing. It has an X based graphical user interface, double entry, a hierarchy of accounts, expense accounts (categories), and can import Quicken QIF files and OFX files.

Dillo 3 is a graphical multi-platform web browser known for its speed and small footprint. It is based on version 1.3 of the Fast and Light Toolkit (FLTK) in version 1.3

xpdf is a light-weight open source viewer for Portable Document Format (PDF) files (also called 'Adobe Acrobat' or 'Acrobat' files). This is just the xpdf viewer client; various command-line pdf tools are now provided via the poppler-utils package.