Free development software for linux

Java Development Environment for Emacs (JDEE) is an Emacs-based integrated development environment (IDE) for developing Java applications and applets.
Features include multiple code browsers, a JPDA-based debugger, method and field completion, template-based and procedure-based code generation, Java source code interpreter, context-sensitive help, and more.
Enhancements:
- On XEmacs, Use efc-xemacs-query-options, i.e., a GUI dialog box instead of a text dialog box, only if use-dialog-box is nonnil.
- Fixes bug in ProjectClasses to avoid duplicate entries of imports.
- Updated JDEEs Ant interface to force use of pipes to interact with external Ant process.
- Fixed regression that caused jde-help-class-member to issue a Lisp error.
- Fixed regression in jde-wiz-update-class-list command.
- Fixed regression that caused JDEbug to issue a Lisp error when launching an application.
- Thanks to Martin Schwamberger.
- Revise the following templates to conform to CheckStyle requirements:
- jde-gen-deep-clone-template
- jde-gen-to-string-method-template
- jde-gen-bean-template
- Thanks to Martin Schwamberger.
- Added the following code generation templates:
- jde-gen-exception
- Generates an exception class in the current buffer.
- jde-gen-exception-buffer
- Generates a buffer containing an exception class.
- jde-gen-hashcode-method
- Generates a hashcode method at point.
- jde-gen-equals-method
- Generates an equals method at point.
- jde-gen-tostring-method
- Generates a toString method that uses Apaches
- ToStringBuilder class.
- Thanks to Ole Arndt.
- Enhanced jde-run-option-classpath to allow you to specify that the JDEE should omit the classpath argument when running the class or application in the current buffer, regardless of the setting of jde-global-classpath.
- Fixed regression that caused the JDEE to switch projects during debugging when stepping into code that does not belong to the project being debugged.
- Updated regular expressions used by the JDEEs interface to jdb to accommodate non-English punctuation styles for numeric expressions in debugger messages, e.g.,
- 1.200 for a line number where the English would write 1,200.
- Thanks to Morten B. Isaksen.
- In previous releases, building javadoc caused all future uses of compilation mode to try to
- display the javadoc. This release fixes the problem.
- Thanks to David Evers.
- Updated the submit-problem-report command to include an XEmacs users init.el file.

Coefficient is a scalable open source project based collaboration platform that can run in J2EE and web application containers.

It currently provides basic collaboration tools as hot deployable modules. It also provides a workflow engine to help guide projects through their development cycle.

KRDesktop is a GPL-ed KDE (QT3) front-end for rdesktop. This provides a GUI interface for windows terminal services (remote desktop) or any other RDP based screen sharing.

Written in Kommander, this also serves as a good example of RAD development under linux.

ArchWay is a full-featured graphical user interface for the GNU Arch revision control system.

It includes a set of specialized tools to make project development and tracking more effective, including an archive browser, inventory manager, and merge interface.

Car PC Development Kit is a kit for making a Linux distribution for a car PC.
Unlike most distributions which come prepackaged and ready to load, this distribution requires downloading, compiling, and post-setup before you can load it into a system.
The end result will be a modular platform for quickly putting together a small Linux system to copy onto boot media and start using.
The target platform is a mini-computer to be installed in an automobile and used either headless or with a monitor and some input device like a keyboard or remote control.
Enhancements:
- Fixes LIRC support for both CAUI and MPlayer.
- Updates the CAUI version, and updates the LIRC package to configure more buttons by default.

MetaBoss is an integrated suite of tools for the design, development, and management of enterprise software systems through modelling.

MetaBoss project utilises OMGs Model Driven Architecture concepts and is primarily oriented at enterprises using Java based tools and technologies.

It encourages serious upfront analysis and design and aims to crystallise the value of it by automating a number of activities in the Software Development Life Cycle.

HTML::Mason is a powerful Perl-based web site development and delivery engine. With Mason you can embed Perl code in your HTML and construct pages from shared, reusable components.

Mason solves the common problems of site development: caching, debugging, templating, maintaining development and production sites, and more.

Mason is 100% free and open source. Although it can be used from CGI or even stand-alone, it is optimally designed for use with two other open source technologies: mod_perl and Apache.

net6 is a library which eases the development of network-based applications. net6 library provides a TCP protocol abstraction for C++.
Enhancements:
- Encryption support through GNUTLS
- Interface changes in the selector
- Allow the use of the net6 protocol with Unix domain sockets
- Send keep-alives to detect dropped clients