logstash – a tool for managing events and logs

logstash

logstash is a tool for managing events and logs. You can use it to collect logs, parse them, and store them for later use (like, for searching). Speaking of searching, logstash comes with a web interface for searching and drilling into all of your logs.

It is fully free and fully open source. The license is Apache 2.0, meaning you are pretty much free to use it however you want in whatever way.

logstash is now a part of the Elasticsearch family!

huginn – build agents that monitor and act on your behalf

huginn – build agents that monitor and act on your behalf

What is Huginn?
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 event flow graph. Think of it as Yahoo! Pipes plus IFTTT on your own server. You always know who has your data. You do.

agent flow

Piwik – Liberating Web Analytics

Piwik is the leading open source web analytics platform that gives you valuable insights into your website’s visitors, your marketing campaigns and much more, so you can optimize your strategy and online experience of your visitors.

Piwik.org