Legal blog aggregators with search features:
Lex Blog includes "channel" (= practice area): International
TIP: Subscribe to receive LexBlog International Updates.
TIP: Search by categories: International Law or International Trade.
Examples of widely read international law blogs:
International Law Prof Blog
Examples of legal blogs focusing on specific legal topics (see also guide tab: Specific Topics):
Asser International Sports Law Blog
ICRC's Humanitarian Law & Policy + Lawfare Institute's LawFare (focus: international humanitarian law, national security issues)
International Economic Law and Policy Blog