Kalkun is an open source web-based SMS (Short Message Service) manager.
It uses Gammu SMSD (part of gammu family) as SMS gateway engine to deliver and retrieve messages from your phone/modem.
Documentation is on the wiki: https://github.com/kalkun-sms/Kalkun/wiki
Development and source code can be found on github: https://github.com/kalkun-sms/Kalkun/
A tool to check periodically web pages of interest and to report changes in html format (e.g. to the start page of your browser) and/or by email (e.g. to SMS gateway).
It can also report almost anything via custom plugins (uptime, disk usage, etc.)