Description
Obviously there is a 64 Bit Service Wrapper for Windows available which isn't GPL.
http://maven.40175.n5.nabble.com/Looking-for-free-wrapper-windows-x86-64-exe-version-3-2-3-td4851520.html
according to this thread there is a ServiceWrapper based on the works of TanukiSoft available at Sonatype for windows in 64 Bit.
This wrapper might be usable for Karaf to run in Windows 64 bit environments.