My personal list (mostly imperative languages)
C++: (Complex software with elegance + performance )
- Dart source code
- V8 source code (Same people as Dart)
- LevelDB
- Chrome (the only downside: too much virtual dispatch -> “javism”)
C:
- SQLite
- Redis
- Nginx
- Solaris and Freebsd
Java:
- Rich Hickey implementation of the clojure runtime in Java (it was there in 2009.. maybe now this is in clojure itself??)
Go:
- The Go standard libraries