Aaron Swartz wrote something noteworthy? If so, it's not web.py.<p>
How about:<p> - Fabrice Bellard. wrote QEMU, TinyCC, FFMPEG, and an awesome IOCCC entry<p> - Miguel de Icaza. wrote GNOME, Mono<p> - Larry Page, Sergey Brin. wrote a program to DoS attack webservers<p> - Bram Moolenaar. wrote everyone's favorite text editor<p> - Richard Stallman. wrote two operating systems, one in Lisp (called 'emacs'), one in C (called 'GNU'). authored the GPL<p> - Bjarne Stroustrup. created C++<p> - Robert Morris. created the Internet Worm (aka "Morris Worm")