OkMap freeware software and Garmin custom maps

Recently OkMap freeware software (www.okmap.org) include a feature to generate automatically compatible Garmin custom maps (kmz format).
The map calibration is sophisticated because OkMap uses different type of projection and several datums.
This new feature includes map tiling from and to different image file formats (including from ECW map files).
It’s possible select KML extensions 2.2 (if GPS supports them), the JPEG quality, KML transparency, draw order, ecc..
You can select the tiles to generate in output.
This feature support also not north oriented maps.
OkMap include a Google maps server to download maps from Google, OpenStreetMap, MyTopo, DOCQ, ecc..
These two features combined together may be very useful.