RPG Maker VX Ace
RPG Maker VX Ace is the latest in the RPG Maker series for creating 2D RPGs. Like XP, it uses the Ruby scripting language.
Being the most advanced and user friendly engine available, in addition to the features of RPG Maker XP it includes overland mapping, quick event generation and a generator to easily create custom character sprites and facesets.
The stock media, especially the characters feature a style similar to the popular Final Fantasy IV game but there is a more XP-similar media set (complete with tilesets and character/monster sheets) in the so called “Mack-style” available for free. There is also a ton of media and scripts available for free made by a creative and helpful community.
RPG Maker VX Ace official website
Japanese website featuring the Mack-style tileset*
Japanese website featuring the Mack-style characterset*
*The original site is down, the links provided are from web.archive.org
The materials I provide includes battlebacks, facesets, sprites and tileset edits.