i386, x86_64, ARMv7 assembler/linker; Nothing-like mid-level language; Linear-scan register allocator; Operating system for Raspberry Pi

An EMACS written in Racket. Runs in ANSI-compatible terminals.

Support for code-reloading for long-running racket programs (such as web-servers).

Erlang-style binaries/bitstrings for Racket

Hash Array Mapped Tries for Racket

Access to raw Ethernet frames from Racket

Fast regexp matching in Racket