WWDC app for OS X - An app to view and watch WWDC sessions on your Mac
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
WWDC Together - Watch and discuss WWDC together
Vanilla Music - Vanilla Music is a clean, simple and opensource music player for Android.
NotesKey - Time travel through Apple's keynotes
VPlayer - VPlayer - a free music player for VKontakte.