Love the stuff by ChowDSP.

AudioThing and TAL have some handy freebies.

There’s a whole treasure trove in Airwindows’ stuff.

I get a lot of use from Reaper’s stock plugins, particularly the EQ, compressor, and limiter.

Reaper users can also help themselves to community-made JSFX.

Vital is my go-to synth.

Cardinal synth is super powerful and a fun can of worms.