Similar to CMU_Common_Lisp

HSQLDB

HTML Tidy

HTTrack

Hypertable

Intelligent Input Bus

Internet/Intranet Input Method Framework

IKVM

InfraRecorder

Initng

InnoDB

Interactive Ruby Shell

Ispell

JACK Audio Connection Kit

Jigdo

Kawa (Scheme implementation)

Public-domain software

Basic Linear Algebra Subprograms

BDS C

BLAKE (hash function)

BLAST (biotechnology)

CLIPS

Curve25519

Daemontools

Djbdns

Hemlock (text editor)