Tool that generates code coverage statistics for JavaScript programs. GPL

JSCoverage 0.3 works by instrumenting the JavaScript code used in Web pages. Code coverage statistics are collected while the instrumented JavaScript code is executed in a Web browser. JSCoverage works with any modern standards-compliant Web browser, such as Internet Explorer, Firefox, or Opera on Windows or Linux.

Firebug

Web Development Evolved: "Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page."

content management system and development framework. GPL

eZ publish 3.9.3
Its most notable feature is its revolutionary, fully customizable, and extendable content model. This is also what makes it suitable as a platform for general Web development. Its stand-alone libraries can be used for cross-platform, database independent PHP projects. eZ publish is also well suited for news publishing, e-commerce (B2B and B2C), portals, and corporate Web sites, intranets, and extranets. eZ publish is dual licenced between GPL and the eZ publish professional licence.

Program for creating charts in Flash to display in Web pages. GPL

Open Flash Chart 1.9.3
You can create bar, line, area, and pie charts. It also includes server side classes to help generate the data file used as input. At the moment, there are classes for PHP, Perl, and Python.

Tiny but flexible CMS. GPL

Zepto CMS 0.9.7 has its own rights management system, which consists of groups and member structures. With these, one can control the whole site and give privileges to friends. Zepto relies on modules to perform its tasks.

Chart creation PHP library. GPL

Libchart 1.2 can generate bar diagrams or pie charts. It is compatible with PHP4/5 (compiled with GD and FreeType) and has no other dependencies.

Secure content management system. GPL

SCMS 0.2
Some of its features are a role-based object-oriented design, conformance to XHTML 1.0 Transitional, strict I/O (input/output) validation, a custom session implementation, support for SSL and cookies (when run over SSL), session identifier regeneration, idle session expiration, account locking, account unlocking methods, encryption (with MD5, AES, SHA1, SHA256, SHA512, or WHIRLPOOL), and event logging.

PHP software for HTML filtering. LGPL

HTML Purifier 2.1.1 is an alternative to BBCode or other obscure custom markup languages. It will not only remove all malicious code (XSS), but will also make sure the HTML is standards compliant.

Framework for developing RIA Web 2.0 applications. LGPL

Humax 0.1 provides a rich set of object-oriented client-side libraries which work seamlessly regardless of the server side technology used.