Not meant to slight any of the RPGs here.  I just have less content to present for these systems.
 

Forthcoming info for:
 

d20 / Dungeons & Dragons 3.5e

What do you know using it?

Dungeons Dragons, Star Wars: Saga Edition, d20 Modern/d20/Future, Scarred Lands
 

Alternate classes and some new ones originally intended for the setting above.
 

Dungeons & Dragons 5th Edition
(and Level Up: Advanced 5th Edition)

What do you know using it?

Primarily I am creating (and converting 3.x Edition content) for Level Up, probably followed with straight 5E versions if that conversion is needed)
 

HoL - Human Occupied Landfill

What do you know using it?

Umm ... this game, duh!
 

This is a really weird and messed up game. It is not meant to be taken seriously. As long you don't take it seriously it can be a lot of fun. This may be the only RPG book you will ever look at where EVERY PAGE is completely HAND DRAWN.
 

No, I didn't say hand-written!
I said HAND DRAWN!?!

I decided to draw my own Character Sheet for the game (this sheet doesn't take itself seriously either):

• Page 1 - HoL Character Sheet: Part The First
• Page 2 - HoL Character Sheet: Part The Second

Megaversal System (Palladium)

What do you know using it?

Rifts, Robotech, Teenage Mutant Ninja Turtles, Nightbane, Palladium Fantasy, Heroes Unlimited
 

The Megaversal system originally started off as a "D&D our way" and has drifted a bit from.
 

PDQ# - Prose Descriptive Qualities Sharp

What do you know using it?

Swashbucklers of the 7 Skies, The Zorcerer of Zo (PDQ)
 

Swashbucklers of the 7 Skies (S7S) is a swashbuckling RPG set in a fantasy world of islands floating in the sky, which offers players the chance to heroically adventure across the heavens. Swashbucklers was an homage to the pulp swashbuckling genre, with a full chapter spent on the tropes of the genre. Swashbucklers is a setting of sky pirates in flying ships battling across a world where islands float in the sky. The game uses Chad Underkoffler's PDQ system (The Zorcerer of Zo), which shares some characteristics with Fate – such as its use of Fortes (or qualities), which could be freeform occupations, motivations, histories or organizations. Swashbucklers uses a new variant of the system called PDQ#, a revamped update that gives characters foibles and techniques and changed conflict into a more tactical system.