The PadMig library is available under the terms of the GNU Lesser General Public License (LGPL), version 3; the PadMig compiler is licensed under the terms of the GNU General Public License (GPL), version 3.
Library and compiler binaries: PadMig 1.0
Source code: SVN repository
Note: Unfortunately, the Spoon version currently used is only compatible until Java 7. Until someone volunteers to port PadMig to a newer version, please use PadMig with Java 7. Note that you can install Java 7 in parallel with other JDK/JRE and only use it for PadMig, and continue using up-to-date JDK/JRE for other purposes. In particular, the code generated by PadMig is still able to run on up-to-data Java versions! Old JDK/JRE are available via the Oracle Archive.