YaCy is a free search engine that anyone can use to build search the internet (www and ftp) or to create a search portal for others (internet or intranet). The scale of YaCy is limited only by the number of users and can index billions of web pages. In p2p mode it is fully decentralized, all users of the search engine network are equal and it is not possible for anyone to censor the content of the distributed index.
RPi-Monitor is a software designed to monitor the metrics from GNU/Linux systems and connected peripherals. It stores statistics in the local Round Robin Database and embeds a web server allowing it to display current status and statistics.
Netfilter tracker is a tracking tool for iptables logs, similar to Checkpoint(tm) Smartview Tracker. Includes storage in an embedded SQL database and a graphical application (viewer) to access filtered data.