Programming is a tough job and to reduce developers' effort we have identified some good IDEs. These freemium IDE's are perfect for beginners and expert programmers.
Anjuta DevStudio
This software development IDE featuring a number of advanced programming facilities including project management, application wizard, interactive debugger, source editor, version control, GUI designer, profiler and many more tools. It focuses on providing simple and usable user interface, yet powerful for efficient development. Operating System: Linux
Cloud9 IDE
It is a cloud-based code editor and Ubuntu workspace. It has both free and paid plans; users can also set up their own Web server hosting the IDE using the code from GitHub. Operating System: OS Independent
Code::Blocks
Code::Blocks is a free C, C++, and Fortran IDE . It supports multiple compilers, multi-target projects, syntax highlighting, code completion, smart indent, an integrated debugger and more. Operating System: Windows, Linux, OS X
Eclipse
Eclipse provides IDEs and platforms nearly every language and architecture. It offers Java IDE, C/C++, JavaScript and PHP IDEs, built on extensible platforms for creating desktop, Web and cloud IDEs. These platforms deliver the most extensive collection of add-on tools available for software developers. Operating System: OS Independent.
IntelliJ IDEA
IntelliJ IDEA supports enterprise, mobile and Web development. It comes in a free community edition or a paid ultimate edition. Operating System: Windows, Linux, OS X.
KDevelop
KDevelop is a free, open source IDE (Integrated Development Environment) for Linux, Solaris, FreeBSD,
Mac OS X and other Unix flavors. It is a feature-full, plugin extensible IDE for C/C++ and other programming languages. Operating System: Windows, Linux, OS X
NetBeans
NetBeans IDE is FREE, open source, and has a worldwide community of users and developers. Useful for developing desktop, mobile and web applications with Java, JavaScript, HTML5, PHP, C/C++ and more. Operating System: Windows, Linux, OS X
Ultimate++
Ultimate++ is a C++ cross-platform rapid application development framework. It includes a set of libraries (GUI, SQL, etc..), and an integrated development environment. It includes a wealth of tools that speed programming include documentation generators, visual designers, and a code analyzer. Operating System: Windows, Linux