Hyehudi.org

Just go to Hadran Alach. It’s simple to use, and there is an offline option, as well.

“This site is provided as a public service by Ohr Somayach. It offers extensive siyum possibilities not found anywhere else online.”

I suggest you help out with “Hamichlol“, the noble, pioneering attempt by “Matmoney Eretz” to render Hebrew Wikipedia suitable for religious Jews.

Find the new wiki’s homepage over here.