Both Windows and Linux versions can be downloaded from here.

Instructions for Linux version are here. 

For instructions on Windows platform, keep reading [read more] this article.

Apona Banan does not need .net or Java or other kind of libraries. It however relies on Miscrosoft Visual C++ runtime libraries on Windows.You most likely already have the libraries, specially if you have latest version of Word installed. The setup programs have all the necessary runtimes bundled. You may need to restart your machine before the runtime libraries are active.