KDevelop is a free IDE for GNU/Linux and other Unix-like operating systems. KDevelop is licensed under the GPL license.
KDevelop does not include a compiler; instead, it uses the GNU Compiler Collection (or, optionally, another compiler) to produce executable code.
The current version, 3.4, supports many programming languages such as Ada, Bash, C, C++, Fortran, Java, Pascal, Perl, PHP, Python, Ruby, and SQL.

Features

Anjuta
Comparison of integrated development environments
Kate