Audio:

• AAC decoder - http://jaadec.sourceforge.net/ (Main, LC, HE-AAC, HE-AAC+)
  
• Ogg Vorbis decoder - http://www.jcraft.com/jorbis/
  
• Speex encoder/decoder - http://jspeex.sourceforge.net/ (based on Speex 1.0.3, latest speex is 1.2rc1)

Video:

• H.264 decoder - http://code.google.com/p/jcodec/ (Baseline profile)