Free code software for linux

Simulator 8085 is a simulator of the 8085 MP for KDE (3.1 and 3.2pre) that allows you write code in a text editor.

After assembling, the hex code is readable alongside the mnemonics. It can handle jumping labels and strings, and you can choose beetween a single or multiple window interface. All 8085 MP inclusive interrupts work.

Code::Blocks is a free C++ IDE built specifically to meet the most demanding needs of its users. The Code::Blocks project was designed, right from the start, to be extensible and configurable.
Built around a plugin framework, Code::Blocks can be extended with plugin DLLs. It includes a plugin wizard so you can compile your own plugins! (Free SDK downloaded separately)
Main features:
- Open Source! GPL2, no hidden costs.
- Cross-platform. Runs on Linux or Windows (uses wxWidgets).
- Made in GNU C++. No interpreted languages or proprietary libs needed.
- Comes in two presentations: Standalone, and MinGW bundle
- Devpack support (optional)
- Extensible thru plugins (SDK available in the downloads section)
- Multiple compiler support:
- GCC (MingW / Linux GCC)
- MSVC++
- Digital Mars
- Borland C++ 5.5
- Open Watcom
- Compiles directly or with makefiles
- Predefined project templates
- Custom template support
- Uses XML format for project files.
- Multi-target projects
- Workspaces support
- Imports MSVC projects and workspaces (NOTE: assembly code and inter-project dependencies not supported yet)
- Imports Dev-C++ projects
- Integrates with GDB for debugging
- Syntax highlighting, customizable and extensible
- Code folding for C++ and XML files.
- Tabbed interface
- Code completion plugin
- Class Browser
- Smart indent
- One-key swap between .h and .c/.cpp files
- Open files list for quick switching between files (optional)
- External customizable "Tools"
- To-do list management with different users

This is an html edit i started building it is my first program and it is only about a week old this is just a preview.
Main features:
- Open and Save Files
- Quick Code Buttons.
- Status bar seconds as a address bar.
- Code, Split, Pre Views
- Hex Color Code Dialog Picker.
- Expander button for streaching views
- You can view your project in real time as you code it.

Blobtrixd is a standalone server for the Blobtrix game, a two-player variant of Tetris.
Enhancements:
- Block dropping speed, launching time, and other similar options can be changed without touching the source code.

Pretty Code Web is a syntax highlighter for publishing code, written in any programming language, to the web.
Written in php it uses syntax files separate from the main code to highlight a specified language.
Main features:
- Syntax highlighting for (potentially) any language.
- User defined syntax files.
- User defined colors
- Separate colors for:
- 6 Keyword Groups
- Text Strings
- Operators
- Block and Line Comments
- Bracket Characters

f-IDE is a development environment for C++.
f-IDE project provides powerful editing, code intelligence, and search capabilities that reduce development time.
Enhancements:
- A bug with starting development on an application has been fixed.

XCL project aims to provide developers with tools for the programmatic handling of executable code, combining easy generation and manipulation with execution speed and memory efficiency at runtime.