[ChaosMarine]

I really like reading RFCs and then implementing the protocols that they describe. Preferably just do it in some plain language without any libraries, just plain old TCP/UDP.

[JoeMayoBot]

A few years back, I needed an x-plat crypto library for HMAC/SHA1 on an open-source project. So, I wen't to the RFCs and built it myself - really fun.

[shambulatron]

What have been some highlights for you? This is something that's struck me in passing a couple of times as a potentially interesting kind of project.