I am using "Geany" found good so far, its fast and light weight IDE.
Among Geany’s features are:
- Code folding
- Session saving
- Basic IDE features such as syntax highlighting, tabs, automatic indentation and code completion
- Simple project management
- Build system
- Color picker (surprisingly handy during web development)
- Embedded terminal emulation
- Call tips
- Symbol lists
- Auto-completion of common constructs (such as if, else, while, etc.)