1. Scribus
Scribus is an open-source program that brings professional page layout to Linux/Unix, MacOS X, OS/2 and Windows. Scribus supports professional features, such as CMYK color, spot color, separations, ICC color and robust commercial grade PDF.
2. SharpDevelop
SharpDevelop is the open-source IDE for the .NET platform. Write applications in languages including C#, VB.NET, F#, IronPython and IronRuby, as well as target rich and reach: Windows Forms or WPF, as well as ASP.NET MVC and WCF. It starts from USB drives, supports read-only projects, comes with integrated unit and performance testing tools, Git, NuGet and a lot more features that make you productive as a developer.
3. Lazarus
The Lazarus IDE is a stable and feature rich visual programming environment for the FreePascal Compiler. It supports the creation of self-standing graphical and console applications and runs on Linux, FreeBSD, MacOSX and Windows.
4. Notepad++ Python Script
A Python Scripting plugin for Notepad++ Complete easy script access to all of the editor's features (including absolutely everything in Scintilla). Configurable menus and toolbar options, assign shortcuts to scripts.
5. Pootle, Virtaal & Translate Toolkit
Tools for localization: - Pootle: web based translation management system. - Virtaal: Computer Aided Translation (CAT) tool. - Translate Toolkit: QA, format conversion and support (PO, Java .properties, OpenOffice, Mozilla, XLIFF, TMX, TBX, CSV, Qt .ts).