libhid is a rewrite of libHID[0] and aims to provide the same functionality
from a more organised framework. It aims to provide a layer of abstraction for
accessing HID-class devices over USB or serial lines (similar to what libusb
provides for the base USB protocol).
  http://www.ghz.cc/~clepple/libHID/doc/html/
libhid has been designed because it is needed in two other projects
(libphdigets and nut). As such, it does not have a complete featureset yet but
is rather a work in progress (alpha state). We invite everyone to contribute
or get in touch with us for additional features.
Please find more information on the project website:
  http://libhid.alioth.debian.org