Lightning's projects:

MyIP with country flag

Information page that tells you your IP address, country, browser used and something else.

Online games

Lots of online flash/shockwave games, racing, shoot'em'up, quiz and so on.

D&D 3.5 Reference guide

A complete reference guide (spells, monsters, classes, races, feats, and much more) for Dungeons&Dragons 3.5 edition.
Builded by Sovelior.

Dice roller

Supports d4, d6, d8, d10, d12, d20, dXX. A must have!
By Wizards of the Coast.

psyBNC

Opensource IRC bouncer by the most psychoid.

Bouncer

Opensource Bouncer, outdated but still useful, by Chris Mason. It supports: redirects, socks protocol, ssl, authentication, ip filtering, daemon mode, logging and some other tweaks.

Barricade

Opensource Port Knocker written by Francesco Vannini.

Network calculator

Simple utility to calculate networks, CIDR and so on. By subnetmask.info.
Dedicated to my friend YaP ;)