Typographer is now free for unlimited prototyping. Really sounds a lot like what Typekit was back in the day. (I know Adobe Fonts does this now, but Adobe Fonts is not a lot of fun to deal with.)
Lots of great foundries included.
Typographer is now free for unlimited prototyping — The Type Founders thetypefounders.com
Typographer, from The Type Founders, is now free for prototyping. Test 15,000+ fonts from foundries you trust, and license only what you use.