Whizbang Dustyboots
Gnometown Hero
I definitely saw a ton of support for Labyrinth Lord, including a bunch of stuff from Necromancer/Frog God.OSRIC came out first but Labyrinth Lord took off soon after and publishers embraced it.
I have all the XRP OSRIC stuff but they are pretty much it for support stuff. I have a ton more LL stuff from a variety of publishers.
1E stuff is still coming out, though. Two new modules are on Kickstarter right now. And I think once the new edition of OSCRIC fulfills, we're likely to see an uptick in 1E/OSRIC stuff, at least for a bit.