The C++ Portable Types Library (PTypes) is a simple alternative to the STL that includes multithreading and networking. It defines dynamic strings, character sets, variants, lists and other basic data types along with threads, synchronization primitives and IP sockets. It is portable across modern Unix and Windows systems and includes a sample HTTP daemon showing the full power of the library.
Mergence is a high-performance HL7 integration engine and application platform based on Apache ServiceMix. It was developed to fill the need for an open source, fully transactional health care integration system capable of handling millions of messages per day and thousands of concurrent LLP connections. Message transformation and scripting is done using Groovy.
The PEAK library tries to achieve high performance in combining multi-threading with an efficient I/O event model. You can write event-based applications that use massive sockets I/O, timers, and signals. Its underlying I/O multiplexing engine supports kqueue(2) (FreeBSD, NetBSD, and Mac OS X), epoll(2) (Linux 2.6), and /dev/poll (Solaris). It provides support for optimized memory allocations, basic database primitives, and synchronization.
Ice is a modern alternative to object middleware such as CORBA or COM/DCOM/COM+. It is easy to learn, yet provides a powerful network infrastructure for demanding technical applications. It features an object-oriented specification language, easy to use C++ and Java mappings, a highly efficient protocol (including protocol compression), asynchronous method invocation and dispatch, dynamic transport plug-ins, TCP/IP and UDP/IP support, SSL-based security, a firewall solution, and much more.
The Fedora software is based on an architecture known as FEDORA (Flexible Extensible Digital Object and Repository Architecture). The software takes advantage of distributed (or local) Web services, and makes representations of objects (called disseminations) available via HTTP. It is particularly good at handling complex digital objects where source datastreams and behaviors are distributed. There are two binary distributions (server and client), and a source distribution (including all libraries and source code needed to build any distribution).
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.
Gantry is a robust Perl-based Web application framework for Apache/mod_perl, CGI, and Fast-CGI. Object-oriented design allows for a pragmatic, modular approach to URL dispatching. It supports MVC and initiates rapid development, offering an organized coding scheme for Web applications.