The Scala 3 compiler, also known as Dotty.
Your favorite language gets closer to bare metal.
Flexible Intermediate Representation for RTL
Kaitai Struct: compiler to translate .ksy => .cpp / .cs / .dot / .go / .java / .js / .lua / .nim / .php / .pm / .py / .rb
Scala incremental compiler library, originally part of sbt
ErgoScript compiler and ErgoTree Interpreter implementation for Ergo blockchain
A transactional programming language.
Scala compiler plugin that finds / discovers all classes having a specific annotations and push them in a registry