LibriVox - free public domain audiobooks
Helium Music Manager - You can take control of your music collection.
Audible - Audible is the world’s largest provider of premium audiobooks and spoken word content.
BookCAT - BookCAT is a powerful book collector database program which will help you catalog a book collection...
Mobilism.org - A home for book lovers, app enthusiasts, and much more.
Music Collection - This Music Collection Software allows you to organize your music collection including CDs, MP3s or vinyl records into a fully searchable database.