- James Van't Slot <james@simple-reliable.com> - for the php calendar extension

- Giorgos Tsiledakis - for the php activecalendar

- frequency-decoder.com - for the tablesort.js javascript library
  NB. this library is released under a creative commons Attribution-ShareAlike 2.5 license
  (http://creativecommons.org/licenses/by-sa/2.5/)
  please read the documentation inside the library file

- Phillip Smith - for many pgsql patches
