Since people have been asking I'd thought I'd go over it
RPG Toolkit is an open source RPG Maker that is aimed at Snes and PS1 era RPGs, but because of it's robust nature and scripting abilities almost anything from this era can be emulated through RPG Code.
Taken from the RPG TK manual.
RPGCode is very easy to learn. It has a relatively concise syntax for the newcomer and sports both procedural and object oriented programming for the more advanced. It borrows certain features from languages like C++ and has a wide range of built-in functions that allow you to manipulate text, graphics, files, and other things. Whether you're new to programming in general or you're a seasoned pro, RPGCode is easy to pick up after a few short sittings.
With it's programming langauge just about any type of game can be made so if you can imagine it, it can be done. But like RMXp or VX you will have to progam it in as almost nothing can be done without using RPG Code.Graphics
RPG Toolkit supports 32bit graphics which by default supports the alpha channel, with 32 bits you can create gfx that far exceed the genesis, super nintendo, ps1 is questionable.
The tile size must be 32X32 but you can use images instead of tiles I heard as I've seen GBA like maps which require 8X8 tiles or higher.
I've seen gfx from TK games that actually outlook anything I've seen from a RPG Maker game and that's saying somthing but the people who spend the time with the gfx are generally the ones who spend more time on the programming than the gfx. Sound
RPG Toolkit supports CD Studio Quality sound so if you were worried about sound fear no more.
Since there's alot to cover, just head over to the TK3 manual.http://tk3.toolkitzone.com/help/?page=23#faq_1.1