RPG Maker XP
RPG Maker XP is one of the most popular engines for creating 2D RPGs. It uses the Ruby scripting language.
Creating a simple RPG is easily done as things like character classes, skill trees, monster blueprints, weapons/items, sounds, music and battle systems are premade, only the scripting takes a little effort. in addition it allows to import almost any kind of custom media and scripts, both of which a vibrant community provides plenty of.
RPG Maker XP offcial web site
The material I provide includes battlebacks, facesets and sprites.