Onyx is a powerful stack-based, multi-threaded, interpreted, general purpose programming language similar to PostScript and Forth. It can be embedded as an extension language into other applications, and was designed to have a small memory footprint. It is among the smallest embeddable interpreters available.
Zild is a C application server with support for the common servlet technology and servlet API in C. It includes support for ServerPages, PHP, XML SAX parser, HTTP/1.1 and SSL/TLS connectors, HTML form-based and Basic Authentication access controls, a built-in embedded SQL database, and many more functions.
Compact Flash Linux Project is a Linux distribution designed to run on a compact flash card in read-only mode. It is as small as possible, and currently needs around 14 MB. It includes OpenSSH, quagga, iptables, hostap, madwifi, wireless-tools, pppoe, tcpdump, bridge-utils, and more.
Neko is a high-level dynamically typed programming language. It can be used as an embedded scripting language. It has been designed to provide a common runtime for several different languages. Learning and using Neko is very easy. You can easily extend the language with C libraries. You can also write generators from your own language to Neko and then use the Neko Runtime to compile, run, and access existing libraries. Neko is a good way for language designers to focus on design and reuse a fast and well-designed runtime, as well as existing libraries for accessing filesystem, network, databases, XML, etc. It has a compiler and a virtual machine. The virtual machine is very lightweight and well optimized. The VM can be easily embedded into any application, and your libraries can be accessed using the C foreign function interface.
Funky is a tiny, embeddable programming language with almost unlimited extending capabilities. It presents itself as a single class that contains the entire interpreter. Two versions of this class exist: Funky::Funky, a floating-point version, and Funky::Groovy, an integer version. You can install your own functions in the language as long as your functions take a vector of the built-in type of the interpreter and return an instance of that built-in type (or a vector of those). Funky is a functional programming language. As such, it treats everything as functions, and those functions handle only one type: double in the case of Funky::Funky, or int in the case of Funky::Groovy.