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[3893 users on Ohloh]
MySQL, the most popular Open Source SQL database management system, is developed, distributed, and supported by Sun Microsystems.
[223 users on Ohloh]
Qt is a cross-platform application and UI framework. Using Qt, you can write applications once and deploy them across many desktop and embedded operating systems without rewriting the source code.
Kate (KDE)
[221 users on Ohloh]
KDE Advanced Text Editor
[215 users on Ohloh]
FindBugs is a defect detection tool for Java that uses static analysis to look for more than 200 bug patterns, such as null pointer dereferences, infinite recursive loops, bad uses of the Java libraries and deadlocks. FindBugs can identify hundreds of serious defects in large applications (typically about 1 defect per 1000-2000 lines of non-commenting source statements). FindBugs is open source, and has been downloaded more than 230,000 times, and is used by many major companies and financial in...
KDevelop IDE
[107 users on Ohloh]
The KDevelop project was founded in 1998 to build up an easy to use IDE (Integrated Development Environment) for KDE. Since then, the KDevelop IDE is publicly available under the GPL and supports many programming languages.
[66 users on Ohloh]
ArgoUML is the leading open source UML modeling tool and includes support for all standard UML 1.4 diagrams. It runs on any Java platform and is available in ten languages.

ArgoUML was installed half a million times during 2005 and is in use all over the world.

Umbrello UML Modeller
[58 users on Ohloh]
Umbrello UML Modeller is a Unified Modelling Language diagram tool for KDE. It is able to produce all types of UML diagrams and uses an XMI-based file format. It imports and generates code in a couple of languages.

Umbrello is part of KDE's kdesdk module.

Boo Programming Language
[41 users on Ohloh]
A wrist-friendly language targeting the Common Language Runtime (.NET / Mono) with an extensible compiler pipeline, a syntax reminiscent of Python, and many other features (like type inference, syntactic macros, etc.)
Trinity Core
[35 users on Ohloh]
An opensource MMORPG framework that allows connections from WOW client. Written in C++ and using Mysql as its DB. Forked from Mangos and kept in sync to some degree.
[24 users on Ohloh]
ASM is a Java bytecode manipulation framework. It can be used to dynamically generate stub classes or other proxy classes, directly in binary form, or to dynamically modify classes at load time, i.e., just before they are loaded into the Java Virtual Machine.
ASM offers similar functionalities as BCEL or SERP, but is much smaller (33KB instead of 350KB for BCEL and 150KB for SERP) and faster than these tools (the overhead of a load time class transformation is of the order of 60% w...
The Bug Genie
[19 users on Ohloh]
The bug genie is a user-friendly and powerful web-based (PHP5) bug tracker/bug tracking tool with features such as project management, svn integration, publishing tools, messaging, calendar +more. Ready to use out-of-the-box, all you need in one package!
[16 users on Ohloh]
Tags: software-development
This is the home of Eclipse - the Extensible Class Library for PHP Software Engineers - an object-oriented programming library written in PHP.
[16 users on Ohloh]
NServiceBus is a powerful, yet lightweight, open source messaging framework for designing distributed .NET enterprise systems.
Entirely pluggable yet simple to use, NServiceBus gives programmers a head-start on developing robust, scalable,
and maintainable service-layers and long-running business processes.
JEDI VCL for Delphi
[10 users on Ohloh]
Tags: pascal project-jedi vcl software-development delphi library
JVCL is a library of over 600 Delphi components developed by "Project JEDI" members.
PLT Scheme
[10 users on Ohloh]
PLT Scheme is an innovative programming language that builds on a rich academic and practical tradition.

It is suitable for implementation tasks ranging from scripting to application development, including GUIs, web services, etc.

It includes the DrScheme programming environment, a virtual machine with a just-in-time compiler, tools for creating stand-alone executables, the PLT Scheme web server, extensive libraries, documentation for both beginners and experts, and more.

It su...

AnyEdit Tools
[8 users on Ohloh]
AnyEdit Tools plugin for Eclipse adds several new tools to the context menu of text- based Eclipse editors, to output consoles, to Eclipse main menu and editor toolbar. AnyEdit contributes also Import/Export working sets wizards.

AnyEdit Tools adds new actions to "Compare With" and "Replace With" menus in both editors and files.

AnyEdit Tools contributes new "Convert" menu in both editors and files, including such actions like "To / From Unicode/Base64/Html entities/Camel case".

[8 users on Ohloh]
Tags: git software-development perl
DevCamps are a software system and conventions for making automated development and staging environments called "camps".

Focused on web applications, camps make it easy to keep development environments up to date, use version control (including in production if desired), and coordinate multiple simultaneous projects and developers.

DevCamps are in extensive use on several dozen sites and adapt well to various workflows.

[7 users on Ohloh]
The tiOPF is an Object Persistence Framework (OPF) for Delphi and Free Pascal that simplifies the mapping of an object oriented business model into a relational database. Persistence layers are available for Firebird, XML, Oracle, SQLServer and many more
[7 users on Ohloh]
A free open source content management system and web application framework. The most widely deployed mod_perl application on the planet.
[7 users on Ohloh]
Tags: rssfeed svn web php development subversion software-development
WebSVN offers a view onto your subversion repositories that's been designed to reflect the Subversion methodology. You can view the log of any file or directory and see a list of all the files changed, added or deleted in any given revision. You can also view the differences between 2 versions of a file so as to see exactly what was changed in a particular revision.