There are a few.

WIPO and juridical infra around it like TRIPS.

Energy Charter Conference (and the treaty it's based on, the ECT).

OSCE: European "regional security" org.

UNCITRAL: codification of international trade practices and dispute resolution.

IAEA: it's meant to make nuclear power available to everyone, in practice it does iffy spying for Western powers.

Would have to think a bit harder, there are more.

But probably the ones on this thread are the major ones.