Pony is an open-source, object-oriented, actor-model, capabilities-secure, high-performance programming language.
Pony introduces fairly unique concept: Reference Capabilities, limiting what you can do with a reference to an object. Using these the compiler ensures that your program is data-race free once it compiles. Concurrency made easy.
Pony has a small community and programming in Pony still involves laying a lot of ground work, which can be great fun! Ever wanted to work on http libraries, database drivers, build tools, dependency managers, even a Pony compiler in Pony itself?