Libraries with their own catalogue for which bibliographic and availability information is searchable in iDiscover:

Darwin College http://koha.dar.cam.ac.uk/

Libraries with their own catalogue for which bibliographic information is searchable in iDiscover but availability will need to be checked in the College catalogue:

Girton College https://girton.cirqahosting.com/HeritageScripts/Hapi.dll/Search1

King's College https://kcc.sirsidynix.net.uk/uhtbin/cgisirsi/?ps=fmbLBvhpam/x/X/60/495/X

Trinity College https://lib-cat.trin.cam.ac.uk/

Libraries with their own catalogue which is not searchable in iDiscover

Downing College  https://library.dow.cam.ac.uk/

Clare Hall https://www.clarehall.cam.ac.uk/library/