Objective Caml is the latest implementation of the Caml dialect of ML. It has full support for objects and classes combined with ML-style type reconstruction, a powerful module calculus in the style of Standard ML (but retaining separate compilation), a high-performance native code compiler (in addition to a Caml Light-style bytecode compiler), and labeled arguments with possible default value.
tgif is a vector-based drawing tool, with the additional benefit of being sort of a web-browser. That is, you can fetch drawings from a web server with it, and you can make objects in your picture into hotlinks to other parts of the drawing, or to other drawings accessible via HTTP.
JpGraph is an OO graph drawing library for PHP 5.1 and above. Highlights of the available features are: multiple scale types; anti-aliasing of lines; color-gradient fills; support for GIF, JPEG, and PNG formats; and support for multiple Y axes. Many plot types are supported, such as pie-charts, lineplots, bar plots, impulse plots, polar plots, error plots, contour plots, matrix plots, gantt charts, and many more. The pro-version also contains extensive 1D and 2D barcode support. The documentation is extensive and is over 700 pages.
Libcwd is a full-featured and well-documented library that assists C++ developers with debugging their applications. It includes support for ostream-based debug output, custom debug channels and devices, memory allocation debugging, run-time sourcefile:linenumber information, and demangled type names of variables. It is thread-safe.
SiteManager is an Open Source Web Application Toolkit for PHP Developers that includes a framework for code modules and layout templates, database connectivity, SmartForms, sessions, and some other tools. All parts of the system are integrated through object-oriented libraries which allow for easy expandability and maintenance.
NetSieben SSH Library is a Secure Shell client library for C++. It utilizes the Botan library for its cryptographic functions, allowing a large choice of algorithms to be used in SSH communications. It integrates Secure FTP client functionality and has been tested in multi-threaded applications.