Until better solution is introduced by Rust core team, the Awesome Rust initiative is probably next best thing
There are also some "Are we X yet?" sites that cover ecosystem maturity for specific topics. Here are all the Rust-specific sites linked from Mozilla's page (https://wiki.mozilla.org/Areweyet):
Web Programming - http://www.arewewebyet.org/
Concurrency - http://areweconcurrentyet.com/
IDE/Editor Support - https://areweideyet.com/
Machine Learning - http://www.arewelearningyet.com/
Game Development - http://arewegameyet.com/