EasyRPG Player is an open source implementation of the RPG Maker 2000/2003 engine.
Check out the EasyRPG Blog for latest news and release notes about EasyRPG

Check out the Download section of the EasyRPG website for all supported (and contributed) builds.
Downloads for the latest stable version and for the latest nightly build are provided. Nightly builds are the newest builds representing the current development state but they can be unusable and not recommended for general use (try them when a game fails with the stable version).
A new version for the Wii (and other platforms) is automatically compiled when a new commit is pushed to the Github repository.