XnView - a slick, free (not open-source) image viewer, converter and batch processor for about 400 graphic file formats. Available on pretty much all common OS'es.
VideoLAN - Very nice, free, media player for all common OS'es. It plays video well, and the default interface is easy, not skinned to death!
VCDEasy - used to be free, but now shareware for making VCD’s. You can get a free limited version though.
FabForce DBDesigner4. Pretty good ERWin replacement. It can reverse-engineer an Oracle schema, but the generated SQL for DDL is still MySQL variant, which won’t work in Oracle right-away.