GTKMathplot is an interactive plotting program based on GTK+ and the Cairo graphics library. It can display bidimensional curves, tridimensional curves, and surfaces from Cartesian or parametric equations describing the mathematical objects you would like to visualize. It is designed to be intuitive for high school students with good mathematical knowledge. University students of engineering, physics, mathematics, or natural sciences should need no explanation at all to start using it proficiently.
QMentat helps you practice mental arithmetic. It uses arbitrary-length fixed point arithmetic, and can handle any size numbers, only limited by the size of your screen (and in the case of division with an integer result, the speed at which the number can be factored). It is also quite configurable, allowing you to tailor the questions to your needs.
Booktype makes it easier for people and organizations to collate, organize, edit, and publish books. Delivering frictionlessly to print, lulu.com, and almost any ereader, Booktype facilitates collaborative production processes, with no more lost manuscripts, overwritten Word files, awkward wikis, or cumbersome CMSes.
Tryton Android is an Android client for the Tryton ERP system. It lets you access and edit your enterprise information (accounting, invoice, production, stocks, and more) from your Android terminal. It is a generic client like the gtk client, and should be compatible with all Tryton modules. It also contains an SVG parser for Android.
GTK+ Recent Files Scrubber is a compact, lightweight Python script which uses GTK's RecentManager to watch for updates to all globally-available "Recently Used" lists (the ones which appear in Open dialogs and the like) and filter out anything in the folders you blacklist. Blacklist entries are hashed to make reading the blacklist not worth the effort.
Super Grub2 Disk is a bootable floppy, CDROM, or USB system which lets you boot into your system. It is simply a Grub2 disk with a lot of useful menus. It can try to autodetect all of your operating systems, load your grub.cfg configuration file, and load grub2's core.img, even if the mbr is damaged. It has multi-language support.