Wachete is described as 'Track web page changes and get notified. Free Sign-up' and is a Website Monitor in the news & books category. There are more than 25 alternatives to Wachete for a variety of platforms, including Online / Web-based, Windows, Linux, Mac and Firefox. The best alternative is Huginn, which is both free and Open Source. Other great apps like Wachete are Distill Web Monitor, Update Scanner, FiveFilters Feed Creator and Visualping.
Huginn is a system for building agents that perform automated tasks for you online. They can read the web, watch for events, and take actions on your behalf. Huginn's Agents create and consume events, propagating them along a directed graph.