Be aware that some resources need an official log-in, but many are open access.
I noted just a few among the abundance of useful resources:
- Databases giving access to the case law of several International Criminal Tribunals
- Database of of all International Law Commission documents, including reports, texts and commentaries, summary records, etc.
- Terminology on disaster risk, tourism, world trade…
You might also be interested in this compilation of UN resources by GlobaLex at NYU law that I posted about a few months ago.
Credit: Many thanks to Library Boy.