hs-plugins 0.9.8 released
Don Stewart's hs-plugins is a cool tool for dynamically loading haskell modules at runtime. hs-plugins history begins with GHCi, which was the first interpreter-like software for GHC. Some time later, Andre Pang wrote the RuntimeLoader, which turned GHCi into a library allowing any Haskell application to do dynamic loading. RuntimeLoader was very close to GHCi, the user needed to handle library dependencies themselves, for example. hs-plugins is a complete solution to dynamic loading in Haskell, it has lots of features and can do all sorts of nifty things.
hs-plugins includes spiffy features like eval, make, and load. The eval function does compiling, loading, and executing a single string's worth of code. the make function checks a source module and its dependencies for any changes since the last compilation, and recompiles and reloads all changed modules.
hs-plugins is already used in several applications. One especially nice example is the Yi editor from the same author, where hs-plugins is used to allow the entire application to be dynamically reloaded from a single Boot.hs startup file.