jmtpfs is a FUSE and libmtp-based filesystem for accessing MTP (Media Transfer Protocol) devices. It was specifically designed for exchanging files between Linux (and Mac OS X) systems and newer Android devices that support MTP but not USB Mass Storage.

Zerofree finds the unallocated blocks with non-zero value content in an ext2, ext3 or ext4 file-system and fills them with zeroes (zerofree can also work with another value than zero). This is mostly useful if the device on which this file-system resides is a disk image. In this case, depending on the type of disk image, a secondary utility may be able to reduce the size of the disk image after zerofree has been run. Zerofree requires the file-system to be unmounted or mounted read-only.

TiMidity++ is a very high quality software-only MIDI sequencer and MOD player.

This package contains the interpreter and some essential modules. It can be used in the boot process for some basic tasks. See /usr/share/doc/python2.7-minimal/README.Debian for a list of the modules contained in this package.

Steam (http://www.steampowered.com) is a software content delivery system developed by Valve software (http://www.valvesoftware.com). There is some free software available, but for the most part the content delivered is non-free.