Linkers and loaders excite this weird part of my brain. I've had this idea in the back of my head for a while now to make some sort of scripting framework that lets you dynamically load natively compiled modules together. Sort of like the LD_PRELOAD trick on steroids: dynamically loading code based on the command line arguments, environment variables, and configuration files. And then you don't have to do any of the command line parsing or initialization stuff in native code, but rather in a flexible scripting language. I guess it would be sort of like trying to implement Spring for C code, as evil as that sounds. I don't think such a system would be actually that useful, but I would find it pretty neat to play with.
