Compatibility list
FreeJ2ME-Plus is capable of running many J2ME apps and games, but it is still far from being 100% accurate. You can find its official compatibility list right below.
J2ME Docs
FreeJ2ME-Plus aims to implement all relevant J2ME Specifications, which go from the common MIDP profiles and related JSRs to vendor-specific APIs from western vendors like Nokia, Siemens, Motorola, and eastern vendors such as SoftBank, NTT DoCoMo, etc.
In case you want to have a look at their javadocs, they're accessible by clicking the button.