NutsManager - PHP/JSON power/gas/water overview manager
Basicly, I got a HUGE energy bill and wanted to get some insight in the usage. Excel/Libreoffice? Meh, let me code!. Uses a JSON file, requires php 5.2 (for the JSON) and creates nice graphs. Also very suitable for a LEB, since no MySQL is needed. Runs fine on a 32-MB ram OpenVZ VM for example...
Will be released when the last bugs are fixed.
(Note, JSON file is not writable on purpose)