.ogg and .flac are music files (.ogg is a free version of .mp3, and .flac is a free lossless music file, so that you get perfect CD quality if you rip your CDs to it).
dbPowerAmp will convert them to another music format for you; you may need to install the odd plugin from their website too.
vlc player will play these files for you, and maybe
winamp too.
.rar is as Gard says, a compressed file like .zip files, but using winrar's own algorithms.
7-zip or winrar will open them for you.
.bin files are either as Gard says (just generic binary files), or they might be disc images that are missing a .cue file: if you want to create a mirror image of a CD or DVD on your computer, you can create a disc image, that consists of a .bin file and a .cue file. If it is a disc image, you can burn these with a burning program like Nero.