I now use and support Home Assistant (https://home-assistant.io)

OK I know the acronym is not very good :) but I really like the name of the project :)

Approach:

• To monitor/control various aspects in the house such as: energy consumption, internet usage, greenhouse monitoring (temp, hum, light), power sockets, remote controls
• No single daemon, several small programs:
  • complex parsers (Web Scrapper, SNMP) coded in Python and run through a CRON job
  • Lightweitght persistent daemons coded in C for housekeeping tasks (upnp-igd, xively)
• All IPC is handled using a MQTT-SN broker (http://mosquitto.org)
• Persistent Storage is outsourced to Xively (http://xively.com)

Modules:

• Power Consumption - iMeter (web scrapper)
• Internet Monitoring - UPnP IGD (IGD)
• Greenhouse / Weather / Power Sockets (arduino on a serial port)
• Xively - Uploading information to http://xively.com

Triggers: Almost all triggers are handled by mqttwarn, even if they call external scripts in "actions"

• turn lights
• notify door opening
• notify killed battery

• mqttwarn (https://github.com/jpmens/mqttwarn/)
• Supervisor (http://supervisord.org)
• libxively (https://github.com/xively/libxively)
• libmosquitto (http://mosquitto.org/download/)
• libconfig
• libjansson
• pkg-config

• Install mqttwarn (e.g. /opt/mqttwarn)
• Install Supervisor
• use the example files in the "extra" directory