cii		Software from C Interfaces and Implementations. Source code
lcc		A retargetable C compiler. With Chris Fraser. Source code
cdb		A machine-independent debugger for C programs compiled by lcc 4.x. Source code
iburg		A program that generates fast tree parsers for cost-augmented tree grammars. With Chris Fraser and Todd Proebsting. Source code

Miscellaneous software is available at:
ftp://ftp.cs.princeton.edu/pub/people/drh/
http://code.google.com/p/drhanson