Ideas for small fun programs

[Code Apperentice]

Post your ideas for small C++ fun programs here! (I made this because I ran out of ideas)

[Avilius]

Maybe a fractal terrain generator & renderer? It seems cool and fun, but I can't see myself ever doing it without losing interest.

[3hM2Nwbp]

My first nontrivial application was a 2d barcode generator and I've suggested it to everyone ever since. Check out Code39 for a simple encoding.

http://en.m.wikipedia.org/wiki/Code_39

[Avilius]

You linked the mobile version.

Fix:
http://en.wikipedia.org/wiki/Code_39

[Lachlan Easton]

Parse a PSD file and output a bitmap.

[MiiNiPaa]

Parse a PSD file and output a bitmap.

https://code.google.com/p/xee/source/browse/XeePhotoshopLoader.m
Line 108

[loopdydoo]

The first thing I did was a text-based RPG