Channel is a C++ template framework for distributed message passing and event dispatching. Its major components (message IDs, routing algorithms...) are highly configurable as template parameters. As a namespace shared by peer threads, channels support publish/subscribe scope control, message filtering, and translation.
Crossroads is a daemon running in user space, and features extensive configurability, polling of back ends using wake up calls, status reporting, many algorithms to select the "right" back end for a request (and user-defined algorithms for very special cases), and much more. Crossroads is service-independent: it is usable for any TCP service, such as HTTP(S), SSH, SMTP, RDP, and database connections. In the case of HTTP balancing, Crossroads can provide session stickiness for back end processes that need sessions, but aren't session-aware of other back ends. Crossroads can be run as a stand-alone daemon or via inetd, and features a management Web interface for monitoring and for modification of parameters.
Drqueue is a distributed rendering queue. It helps manage jobs on a render farm. It works under Linux, Mac OS X, FreeBSD, IRIX, and Windows, supports Maya, Blender, Lightwave, Mental Ray, Bmrt (Renderman), 3Delight, and Pixie out of the box, and can support any other renderer or computing task that can be handled via scripting.
Equalizer is middleware for creating and deploying parallel OpenGL-based applications. It enables applications to benefit from multiple graphics cards, processors, and computers to scale rendering performance, visual quality, and display size. An Equalizer-based application runs unmodified on any visualization system, from a simple workstation to large scale graphics clusters, multi-GPU workstations, and Virtual Reality installations.
Fluffy Linux Cluster will create a "virtual IP address" shared between two or more machines on the same shared segment (i.e. LAN). TCP-based services running will be automatically load-balanced between the available machines. No dedicated "load balancer" is required, and failed nodes will be detected automatically and taken out of the cluster until they are fixed.
Galera wsrep provider is a dlopenable generic replication library which implements the wsrep provider API. It provides very efficient synchronous replication, and multi-master and "parallel applying" capabilities for opaque data buffers. Its primary focus is data consistency. A transaction is either committed on every node, or not at all. It works anywhere TCP works, including on WAN, and can utilize UDP multicast where available. It is used by the MySQL-wsrep patch project to create true multi-master MySQL/InnoDB clusters.
Gled is a C++ framework for rapid development of applications requiring a GUI, 3D graphics, or support for distributed computing. It extends the ROOT framework (a standard data-analysis tool in high-energy physics) with mechanisms for object collection management and serialization, multi-threaded execution, GUI auto-generation (object browser and editor), and dynamic visualization (OpenGL). The distributed computing model of Gled is a hierarchical tree of nodes connected via TCP/IP sockets. Gled provides authentication and access control, data exchange, proxying of object collections, and remote method-call propagation and execution. It can be dynamically extended with library sets. Their creation is facilitated by a set of scripts for creation of user-code stubs. Simple tasks and application configuration can be done efficiently via the interactive C++ interpreter (CINT). Gled is used for development of programs in high energy physics and as a research tool in distributed and grid computing.