Pdsh is a high-performance, parallel remote shell utility. It uses a sliding window of threads to execute remote commands, conserving socket resources while allowing some connections to timeout if needed.

Nodediag provides an extensible TAP framework for executing node diagnostic checks at system startup.

ConMan is a serial console management program designed to support a large number of console devices and simultaneous users.

CRM114 is a system to examine incoming e-mail, system log streams, data files or other data streams, and to sort, filter, or alter the incoming files or data streams according to the user's wildest desires. Criteria for categorization of data can be via a host of methods, including regexes, approximate regexes, a Hidden Markov Model, Orthogonal Sparse Bigrams, WINNOW, Correllation, KNN/Hyperspace, or Bit Entropy ( or by other means- it's all programmable).

documentr is a free, open-source, Web-based tool to edit and present software documentation. It allows to easily maintain documentation for multiple products and product branches.

SemanticScuttle is a social bookmarking tool experimenting with features like structured tags and collaborative tag descriptions.

Kamailio is able to handle thousands of call setups per second. Among features: asynchronous TCP, UDP and SCTP, secure communication via TLS for VoIP (voice, video); IPv4 and IPv6; SIMPLE instant messaging and presence with embedded XCAP server and MSRP relay; ENUM; DID and least cost routing; load balancing; routing fail-over; accounting, authentication and authorization; support for many backend systems such as MySQL, Postgres, Oracle, Radius, LDAP, Redis, Cassandra; XMLRPC control interface, SNMP monitoring. It can be used to build large VoIP servicing platforms or to scale up SIP-to-PSTN gateways, PBX systems or media servers like Asterisk™, FreeSWITCH™ or SEMS.

This is the world's first open source HTML5 SIP client entirely written in javascript for integration in social networks (FaceBook, Twitter, Google+), online games, e-commerce websites...
The client can be used to connect to any SIP or IMS network from your preferred browser to make and receive audio/video calls and instant messages.

Ganeti is a cluster virtual server management software tool built on top of existing virtualization technologies such as Xen or KVM and other Open Source software.