- Web-OPAC Central Library
- Worldcat
- CyberDewey : CyberDewey: is the catalogue of World Wide Web by David A. Mundie created in 1995
- IndCat: Union Catalogue of Indian Universities
- Infoport
- Union Calatlogue Government Libraries
- National Union Catalogue of Scientific Serials in India (NUCSSI)
- Union Catalogue of Indian Law Libraries (OPAC)
- EZB (E Journal Library/Calalogue) : EZB is a service to facilitate the use of scholarly journals on the internet. It offers a fast, structured and unified interface to access full-text articles online.