MissingH is a library of all sorts of utility functions for Haskell programmers. It is written in pure Haskell and thus should be extremely portable and easy to use. It also has no prerequisites save those that are commonly included with Haskell compilers. Highlights of MissingH include a full logging infrastructure, printf() implementations, various string and I/O utilities, a FTP client library, and more.
hslogger is a logging framework for Haskell, roughly similar to Python's logging module. hpodder lets each log message have a priority and source be associated with it. The programmer can then define global handlers that route or filter messages based on the priority and source. hslogger also has a syslog handler built in.