More no-code than programming language but Lotus Notes totally blew my mind.

Imagine going from pre World Wide Web - and for many companies pre-email - age of local area networks (for file sharing only) and 38.K modems directly to group and user oriented, email integrated, distributed, replicated, graphics and multimedia integrated, no-code, document oriented, user programmable, fully GUI, secure, distributed database applications.

Lotus Notes blew my mind completely. A truly amazing application at the time.