TokyoPowerHeartModoki is a project mainly written in OBJECTIVE-C and C, it's free.
Yet another TokyoPowerHeart for Mac OS X
TokyoPowerHeartModoki - Yet another TokyoPowerHeart for Mac OS X. Copyright (C) 2011 oraccha
This program is strongly inspired by @qurihara's TokyoPowerHeart (http://sites.google.com/site/tokyopowerheart/). It uses a TEPCO power usage REST API (http://tepco-usage-api.appspot.com/).
Get TokyoPowerHeartModoki code:
$ git clone git://github.com/oraccha/TokyoPowerHeartModoki.git
Get stig's JSON framework from https://github.com/stig/json-framework/downloads and unzip it on the same directory like that:
$ ls TokyoPowerHeartModoki JSON v2.3.2 (Mac) ...
Open the project file and click "build & run":
$ open TokyoPowerHeartModoki/TokyoPowerHeartModoki.xcodeproj