aInvisiclue is a small program to decode the Infocom Invisiclues. It won't translate the whole files as you should only translate one hint at a time, but it is very easy to cut and paste. The encoding is very simple: A => B, B => C, ..., Z => A.
A tool that computes CRCs with standard as well as custom polynomials.
A robust and flexible SIP server.