Sift – Write readable and type-safe regular expressions in Java
Type-state machine forces valid regex at compile time—IDE won't suggest invalid steps.

Uses QBE to skip VM overhead and emit native binaries directly.
Systems programmers and compiler enthusiasts
Crafting Interpreters · Writing A Compiler In Go
Type-state machine forces valid regex at compile time—IDE won't suggest invalid steps.
Calculator CLI for LLM agents when they could just call Python's math library.
Zig comptime crypto library outperforms Rust's backed-by-Paradigm standard on 19/26 benchmarks.
Handles interval division by zero correctly using union arithmetic instead of crashing.
Finally, a Python DSL that outputs real Excel formulas instead of baked values.
Compile-time ZON config eliminates runtime parsing overhead for i3bar.