Warrior and Wizard is an RPG and Combat game apparently inspired by The Fantasy Trip.
Seven Hex Dragon has some free pdf character sheets for The Fantasy Trip.
JAGS stands for Just Another Game System and is described as a “rules heavy” universal RPG system. It’s gotten some notice around the ‘net and is available for free as a pdf or you can pay to get a print version.
The Basic Fantasy Role Playing game is just that — a role playing game released under the Open Game License. it’s based on the d20 3.5 rules, but takes its inspiration from old school role playing.