Free multimedia player. GPL

xine: " is a It plays back CDs, DVDs, and VCDs. It also decodes multimedia files like AVI, MOV, WMV, and MP3 from local disk drives, and displays multimedia streamed over the Internet. It interprets many of the most common multimedia formats available--and some of the most uncommon formats, too. All those features come in a reusable library (xine-lib) which can easily be embedded in your applications."

Perl Audio Converter. GPL

freshmeat.net: "Perl Audio Converter is a tool for converting multiple audio types from one format to another. It supports AAC, AC3, AIFF, APE, AU, AVR, BONK, CAF, CDR, FAP, FLA, FLAC, IRCAM, LA, LPAC, MAT, MAT4, MAT5, M4A, MMF, MP2, MP3, MP4, MPC, MPP, NIST, OFR, OFS, OGG, PAC, PAF, PVF, RA, RAM, RAW, SD2, SF, SHN, SMP, SND, SPX, TTA, VOC, W64, WAV, WMA, and WV. It can also convert audio from the following video extensions: RM, RV, ASF, DivX, MPG, MKV, MPEG, AVI, MOV, OGM, QT, VCD, SVCD, M4V, NSV, NUV, PSP, SMK, VOB, FLV, and WMV. A CD ripping function with CDDB support, batch conversion, tag preservation for most supported formats, independent tag reading/writing, and extensions for Amarok, Dolphin, and Konqueror are also provided."

Super Grub Disk. GPL

freshmeat.net: "Super Grub Disk is a bootable floppy or CDROM that is oriented towards system rescue, specifically for repairing the booting process. Super Grub Disk is simply a Grub Disk with a lot of useful menus. It can activate partitions, boot partitions, boot MBRs, boot your former OS (Linux or another one) by loading menu.lst from your hard disk, automatically restore Grub on your MBR, swap hard disks in the BIOS, and boot from any available disk device. It has multi-language support, and allows you to change the keyboard layout of your shell."