Practical /prog/ramming

What are some practical things to program? I am in the midst of making an RPG, but I am just curious as to what /prog/ does in their spare time.

You can post practical or impractical programming, I don't care.

Judging from the blogs maintained by our regulars, recent /prog/ projects seem to be:

1. A Bézier curve plotter.
2. Some type of Javascript/Sepples hybrid monstrosity, I don't know.¹
3. Heavy drinking.
4. Quietly sulking over being banned.

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¹ I don't like it either, but he posts frequently. Technically, that makes him a regular.