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Eric3 is a Python IDE written using PyQt and QScintilla. It has integrated project management capabilities with class browsing functions, gives developers an unlimited number of editors with syntax highlighting and code folding, an integrated Python shell, an integrated Python debugger, a file system browser with class browsing capabilities for Python files, and more.

Flawfinder searches through source code looking for potential security flaws. It will provide a list of potential security flaws, sorted by risk, with the most potentially dangerous flaws shown first. This risk level depends not only on the function, but on the values of the parameters of the function. Flawfinder ignores text inside comments and strings.

Gambas is a graphical development environment based on a Basic interpreter, like Visual Basic (but it is NOT a clone !). It uses the Qt toolkit, but is able to use any other toolkit that a module is written for.

Meld is a visual diff and merge tool. It integrates with most version control systems. The diff viewer lets you edit files in place (diffs update dynamically), and a middle column shows detailed changes and allows merges. The margins show location of changes for easy browsing, and it also features a tabbed interface that allows you to open many diffs at once.

monotone is a free distributed version control system. it provides a simple, single-file transactional version store, with fully disconnected operation and an efficient peer-to-peer synchronization protocol. it understands history-sensitive merging, lightweight branches, integrated code review and 3rd party testing. it uses cryptographic version naming and client-side RSA certificates. it has good internationalization support, has no external dependencies, runs on linux, solaris, OSX, windows, and other unixes, and is licensed under the GNU GPL.

PMD scans Java source code and looks for potential problems like: Possible bugs - empty try/catch/finally/switch statements. Dead code - unused local variables, parameters and private methods. Suboptimal code - wasteful String/StringBuffer usage. Overcomplicated expressions - unnecessary if statements, for loops that could be while loops. Duplicate code - copied/pasted code means copied/pasted bugs.

RapidSVN is a cross-platform GUI front-end for the Subversion revision system written in C++ using the wxWidgets framework. This project also includes a Subversion client C++ API.

Redet is a tool for developing and executing regular expressions using any of more than 40 search programs, editors, and programming languages, intended both for developing regular expressions for use elsewhere and as a search tool in its own right. For each program in each locale, a palette showing the available constructs is provided. The properties of each program are determined by runtime tests, which guarantees that they will be correct for the program version and locale. Additional features include persistent history, extensive help, a variety of character entry tools, and the ability to change locale while running. Redet is highly configurable and fully supports Unicode.

The goal of the Subversion project is to build a version control system that is a compelling replacement for CVS in the open source community.

Sysprof is a sampling CPU profiler for Linux that uses a kernel module to profile the entire system, not just a single application. Sysprof handles shared libraries and applications do not need to be recompiled. In fact they don't even have to be restarted. Just insert the kernel module and start sysprof.

Valgrind is an award-winning suite of tools for debugging and profiling Linux programs. With the tools that come with Valgrind, you can automatically detect many memory management and threading bugs, avoiding hours of frustrating bug-hunting, making your programs more stable. You can also perform detailed profiling, to speed up and reduce memory use of your programs.