This was written for mineserver (http://mineserver.be/) but may be useful for other people or projects. It's light on features and footprint, consisting of a single header file of less than 100 lines per HookN definition.
The Hook[N] classes are used to store function pointers primarily and contain
a couple of convenience functions to call said functions a) sequentially from
first to last, b) sequentially until one returns true or c) by index.
There's an example in app.cpp that shows how it all comes together. The
gen.pl script can be used to generate more Hook[N] definitions, should they
be required. The default hook.h distributed with this contains definitions for
hooks with up to 20 arguments. If you're using more than 20 arguments... Wow.
BSD 3 clause license. There's a copy included with the source.
Probably github is easiest for this. You might find me in #mineserver on irc.esper.net as well if you want some kind of real-time response. That is if I'm not sleeping at the time (or pretending to sleep). If you want to send me email, decode the following text using base64:
ZGVveHhhQGZrbnNycy5iaXoK
(Try harvesting that, spam spiders!)