Plotter is a GTK+ mathematical graph plotting application. It is written entirely in Python using the PyGtk bindings. Features of Plotter include plotting of cartesian, parametric, and polar equations. An unlimited number of plots can be displayed in individual colours. Plotter supports graph zooming and panning, and loading and saving of sets of graphs. New functions can easily be added from within the program.
juked is a daemon that turns a server into a music jukebox. Clients communicate with the server via TCP/IP using an XML protocol. It features playlist support, user authentication (optionally with PAM), and random track selection. Audio decoding is done using XMMS plugins, so both Ogg and MP3 are supported. Track (song) information can be stored internally or in a MySQL database.
RotNN.py is a python module that allows the user to do rotational encryption and de-encryption to obfuscate text. The default functionality is the same as rot13, however you can rotate the text any amount you wish: 15, 21, 4... (Hence the NN.) RotNN also includes two functions, srotate and wrotate, which operate on the entire (UNIX, at least) printable character set. They utilize rotation also, only on more than just A-Z and a-z.