The most POPULAR software for removing DRM protection:

WM RECORDER
the easiest audio/video stream ripper

WM CAPTURE - Super high quality on-screen video recorder.

SOUNDTAXI
remove DRM protection from Windows Media, iTunes music and video files

Other RECOMMENDED software and services:

• AUDIO/VIDEO STREAMING CAPTURE SUITE
  the best audio/video stream recording/capturing bundle
• REPLAY MUSIC
  the best streaming music recorder
  
  
• REPLAY MEDIA GUIDE
  free service to find and record online radio, Internet TV, podcasts
• AVS VIDEO TOOLS
  convert, split, join, remove commercials, edit, rotate, apply effects, capture, transfer, copy, rip and burn DVD and video files
• EMUSIC
  the best legal music download service
• AUDIBLE
  download audio books, audio magazines, newspapers, radio programs

• How to crack Windows Media Player DRM (Windows)
• How to Remove DRM from Windows Media Player files with FairUse4WM 1.3 (Windows)
• How to remove DRM from Windows Media Player files with fu4wm13fix-2 (Windows)
• How to remove DRM from Windows Media Player files with fu4wm13fix (Windows)
• How to remove DRM from WMV, ASF, WMA (Windows Media audio and video) files with valid licenses using Automate unDRM 2.0. Windows Media Player 9 or 10.00.00.3646 required. (Windows)
• Windows Media Player Individualization Process.

Removing DRM from iTunes AAC audio files

• How to remove copy-protection from iTunes AAC files

Removing DRM from Windows Media Player and iTunes

• FAQ on Removing DRM from WMV, WMA, M4P, AAC files with freeTunes (Windows)

Removing DRM from Audio Books

• FAQ on Converting copy-protected Audio Books to MP3 with Freecorder (Windows)