Only uncompressed ICO files with 1, 4, 8, 24, and 32 BPP can be read. Support for writing ICO files is not planned (no patent issues; I just don't feel like doing that :-)). Send me a 16 BPP ICO file, and I might add support for that.
AC.lib-ICO runs on any platform (Windows, Linux, Apple, any!) because it is written in Java. Java usually will be allready installed on your system. In the case it is not (shame on the manufacturer!), the Java Run Time Environment (JRE version 1.4 or higher) can be downloaded from Sun. Just select the JRE for your operating system. It's not too big, and it's well worth the effort ;-).
AC.lib-ICO is open source (GPL), so it costs nothing. Commercial licenses are available on request (in example, for commercial closed source uses).
AC.lib-ICO has been commercially licensed by (excerpt):
AC.lib-ICO is available as a zipped package from SourceForge.
None so far. You've got one? Email me!