When comparing Gnome Builder vs KDevelop, the Slant community recommends KDevelop for most people. In the question“What are the best IDEs for C++ on UNIX-like systems?” KDevelop is ranked 10th while Gnome Builder is ranked 17th. The most important reason people chose KDevelop is:
Kdevelop has very smart syntax and semantic syntax highlighting.
Specs
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Pros
Pro Great language support (for linux based projects)
Python, C, Java, Javascript, Go, Vala, C++, and many more.
Pro Integrates nicely into the GNOME Desktop Environment
Client-side decorations, good use of widgets.
Pro Lovely find and replace tool with great REGEX support
Shows a live feedback of what matches the pattern/criteria entered.
Pro Terminal built in
Fully featured terminal is packaged.
Pro Autocomplete
Fast autocomplete.
Pro Supports versioning (git)
Shows diff indication and has branch integration too.
Pro Integrated debugging
Pro Integrated system-wide profiler for improving software performance
Pro Templating
Good templates available to build applications, even to build gnome applications.
Pro Tiling Editor capability
Supports Tiling.
Pro Extendable through plugins
Pro Excellent syntax highlighting
Kdevelop has very smart syntax and semantic syntax highlighting.
Cons
Con No project management
Because it is still in early development there are little project management functionalities.
Con Only preliminary support for Windows
Con Works with no problems only on Linux
KDevelop is an IDE for the KDE platform. Even though it's cross-platform, it's mostly targeted at Linux systems and the versions for other operating systems are highly experimental.