One of those nifty system monitoring packages, with all the buzzwords you'd expect. Watches systems as well as applications. Has a dashboard, which I think you can disable. Realtime, too. Supports third party extensions and applications. Tries to use as little RAM as possible, tries to carry out as little storage I/O as possible. Claims to have a web API. Zero dependent packages.
Can notify through multiple means, including IRC, email, Pushover, and custom endpoints.
There is an OpenWRT package called 'netdata' which can be installed normally.
Glances is a cross-platform system monitoring tool written in Python. Combines many of the features of top, htop, netstat, and tail. If you also install Bottle it'll present not only a web dash board, it'll present a REST API and XML-RPC interface also. Can export its stats to a number of different databases.
A ruleset-based access control system for the Linux kernel.
A website dedicated to helping people navigate mazes of IVR systems to talk to a human operator.
A website that can extract many different sorts of information pertaining to IP addresses and networks, least of all querying several dozen blacklists to see if an address has been flagged as a spammer's.
Data forensics software for Windows. Useful for finding lost and hidden data by examining disk sectors directly, not file system extents. Free to download and use. Supports Windows 95 through Windows XP.
A Perl script which analyzes the OS it's running on top of to determine whether or not it's virtualized, and if so which product(s) it's inside of. Uses multiple techniques (no red pills, I don't think) to gather information.
emcomm system designed for emergency situation use when the communications grid is offline. Dedicated hardware base stations and on-board webapps. Registered users can get access to the data, others cannot. encryption Smartphone app for accessing the services. Supposedly the app is p2p as well. GWOB and Frank Sandborn are involved in the project; good.
Software that lets you plug game system emulators into an easy to use front-end for playing games. Lets you play games for many different platforms. Hardware acceleration enabled.
Implements a SQL layer on top of the OS so you can run queries against system state. Stores and detects state differences. Uses the underlying system API to do its thing. Daemon, with a CLI interface. Alerting, et al has to be implemented yourself but at least the base layer is done for you.
A system monitoring dashboard for linux. Multiple web servers supported, nodejs seems to be the most reliable Python available.