The drkhtb project was designed with medium to major Internet Service Providers in mind. Featuring extended hashing support, error handling, and simple configuration options, it has proven to be a stable solution for shaping up to 15000 residential clients with both upload and download rules, it is considered stable and is already in use as a production platform in at least one major ISP running 4 shaping bridges, each handling up to 2 Gbit/s, with a total of 48000 active clients and over 60000 filter rules in each direction. At this point there is no reason to believe that further bandwidth cannot be handled by one bridge, but there have not been sufficient resources to extensively test it. It is believed that up to 4 Gbit/s can be shaped on one individual machine serving at least 20000 clients.
Secrond is a light-weight cron implementation that allows running of user-specified programs at periodic scheduled times, handling tasks in intervals of seconds rather than minutes, as well as hours and days. While it is possible to achieve similar behavior by using a traditional cron daemon and adding calls to sleep() to the programs executed, it is impractical.
Viper is a system for completely automated installation and configuration of Debian GNU/Linux-based systems. It uses a modern approach with debian-installer and puppet, works with existing Debian packages, and does not require any custom patching of either install media, client, or server. The basis of the whole system is an LDAP server containing all configuration data.
Chev is a sane by default vulnerability check script that checks NIST and US Cert RSS feeds for a short list of software that you configure. It has two levels of priority, warn and critical, which allows for easy use with Nagios as a stand-alone script or in a cron job. Just add strings for your major pieces of software and chev will tell you when a vulnerability has been released.
The Marionette Collective (mcollective) is a framework to build server orchestration or parallel job execution systems. It uses modern technologies and concepts that make it ideal for large and cloud-based infrastructures. It's specifically geared towards systems administration tasks, but can be seen as a generic framework too.
The Logfile Navigator, lnav for short, is a curses-based tool for viewing and analyzing log files. The value added by lnav over text viewers or editors is that it takes advantage of any semantic information that can be gleaned from the log file, such as timestamps and log levels. Using this extra semantic information, lnav can do things like interleaving messages from different files, generate histograms of messages over time, and provide hotkeys for navigating through the file. These features are meant to allow the user to quickly and efficiently focus on problems.
GoAccess is a real-time Web log analyzer and interactive viewer for almost every Web server. It runs in a terminal and provides fast and valuable HTTP statistics for system administrators that require log monitoring and visual reports on the fly. GoAccess can monitor unique visitors, browsers, spiders, OS, hosts and IP geolocation, keyphrases, referring sites, status codes, etc. It has support for IPv6 and it parses nearly any Web log format.