Library 2.0W
Library 2.0
BibSonomyW
BibSonomy
Capital CollectionsW
Capital Collections
ColwizW
Colwiz
The Library CorporationW
The Library Corporation
Live Search BooksW
Live Search Books
MusicBrainzW
MusicBrainz
Open LibraryW
Open Library
PaperpileW
Paperpile
ReadgeekW
Readgeek
RefbaseW
Refbase
RefDBW
RefDB
RuniversW
Runivers
ShelfariW
Shelfari
SkoobW
Skoob
TropyW
Tropy
ZoteroW
Zotero