1.4
http://www.trends.net/~mu/pilot.html
If you wish to compile yourself: get the source package. You need GNU Bash, and Mingw32 GCC and BinUtils. Configure, Make, and Make install work without changes.
Contains documentation in Html, MS-Windows Help, Postscript, PDF and TeX DVI format.
The package can be downloaded from the GnuWin32 projectpage.