inventaire.io - Keep an inventory of your books. Share it with others. Discover the books available in your network!
Postly - Turn your photos into REAL beautiful postcards. Available on iPhone, iPad and Android. Make friends and family smile with a postcard!
Goodreads - See what your friends are reading.
Sutle - Save and organize resources into a directed learning path.
readng - Reading lists, book tracking, reviews & stats!
Golden - Mapping all human knowledge