PascalScript: Freewre
 + Easier methods and events rigging
 + Supports D7
 - No active development
 - Requires manual serialization


DWScript: Freeware
 + Actively developed
 + More syntax features
 + Possibly easier serialization(?)
 - Harder to rig
 - No support for D7 (only D2009+ ?)


PaxCompiler: Shareware
 + Claimed to be fastest out there
 - Not freeware
 - ?