I'm not sure if this had been posted before, but I just confirmed that Rainboot has been released as freeware from June 15, 2010.
The author, Andreas Falkenhahn, has put these words into README file:
"As I don't have any more time to maintain this program, I decided to release Rainboot and accompanying programs as Freeware. A free keyfile dedicated to the Amiga community is included in this archive. Live long and prosper!"
Thanky You, Mr.Falkenhahn, for this noble act.
Rainboot3 can be found at
http://www.airsoftsoftwair.de/en/down_legacy.htmlThere's also a nice pile of other Amiga software, perhaps also gifts to the Amiga community.