Yes, Maplet does lightmapping (though I think only on maplet models) and the Blitz user edition is free to all Blitz user. You can find it here:-
http://www.blitzbasic.com/file/get.php?file=/updates/Blitz3D/updates/MapletSetup101.exe
http://www.blitzbasic.com/file/get.php?file=/updates/Blitz3D/updates/MapletSetup101.exe