Doesn't follow standard go style (coding conventions etc) - WIP
This has not be subject to any kind of targeted tests (performance or otherwise), so use this with a bit of caution - It's at the moment perhaps best suited for simulators
Paysim
An open ISO8583 Simulator
The application is built using go and GTK+2 bindings made available at github.com/mattn/go-gtk (Thanks a ton Yashuhiro Matsumoto!)
The entire source code is available at https://github.com/rkbalgi/go
The interesting packages would be github.com/rkbalgi/go/execs/paysim, github.com/rkbalgi/go/paysim and github.com/rkbalgi/iso8583
There are loads of other interesting things available in other packages – like a minimalist implementation of a Thales HSM for basic commands (A6, MS, M6 and the like)