CPC (Continuation Passing C) is a programming language designed for writing concurrent systems. The CPC programmer manipulates very lightweight threads, choosing whether they should be cooperatively or preemptively scheduled at any given point; the CPC program is then processed by the CPC translator, which produces highly efficient event-loop code. This approach gives the best both worlds: the relative convenience of programming with threads, and the low memory usage of event-loop code. The semantics of CPC is defined as a source-to-source translation from CPC into plain C using a technique known as conversion into Continuation Passing Style. The current implementation of CPC has been used to write Hekate, a BitTorrent seeder designed to handle millions of simultaneous torrents and tens of thousands of simultaneously connected peers.
Crules is a dynamic programming language that takes influences from Python, Perl, and Haskell. The main motivation for this language was the concept or design of a new paradigm or feature called "rules". A rule is a potential entry point which has dependencies rather than parameters. Any rule can be overridden to have different or no dependencies. Since the language itself can decide on the best course of actions for an operation, dependencies become preconditions for execution. It also features lazy evaluation, object orientation, variadic and anonymous-parameter functions, and reflection. These features help make the language truly dynamic.
I is a programming language that was designed to be efficient to write and run. The system incorporates many major libraries, allowing the creation of major projects such as Aciqra. It is an interpreted language and supports CGI scripting through the use of the CGI for Aciv/I extension.
Pythonect is an experimental general-purpose dataflow programming language based on Python. It provides both a visual programming language and a text-based scripting language. The text-based scripting language aims to combine the quick and intuitive feel of shell scripting with the power of Python. The visual programming language is based on the idea of a diagram with “boxes and arrows”.
Qt for Urbi is a binding of the Qt library in Urbi, enabling you to create native graphical interfaces dynamically directly from Urbi. It exposes urbiscript events to ease the use of Qt signals and slots. Major and minor version numbers of the Qt for Urbi packages reflects the Urbi SDK version number for which they were built. Loading it in another version of the Urbi kernel probably won't work. For instance, Qt for Urbi 2.4.x will only work with Urbi SDK 2.4.y. It is still a bit experimental. Only the 32-bit Linux version is available, and not all classes and members are bound yet.
Rhope is a dynamically typed dataflow programming language that also borrows some ideas from other paradigms. Unlike mainstream programming languages, statements are not necessarily executed in the order they are written, but instead based on their dependencies. Statements that do not share dependencies run in parallel. Most operations have value semantics (i.e. modifying an object makes a copy rather than changing the original) making this parallelism safe. For managing global state, Rhope has a transaction mechanism.