Free cross platform software for linux

Cross Platform Toolkit Library (xtklib) is a C++ based framework for highly object-oriented cross-platform programming.
In particular, the library provides a full abstraction layer between its API and the main services offered by the underlying operating system(Thread, processes,GUI,Filesystem,etc.) plus a set of generic utilities (Strings,Data structures,etc.).
Unlike other famous libraries, xtklib makes full use of all features of C++ like RTTI, Templates, Exceptions thus obtaining a strongly object-oriented design with a Java-like sensation.
The library is composed by two main modules: "Base" and "Widgets". The target operating systems are Windows and Unix(Linux and BSD in primis) with a plan to move also towards other systems.
Main features:
- Use of modern C++ - use of many powerfull features offered by modern C++ like exceptions,RTTI,templates and namespaces allows faster development,improves code readability,and reduces programming errors.
- Strong Object-Oriented design - designed to meet requirements of modern software industry: modularity, low coupling, high cohesion,information hiding. Design patterns and advanced class hierarchies are extensively used in all the library.
- Ease of use - Clean and intuitive programming interface with a Java-like sensation.
- Complete - Features supported includes:
- Basic services: Thread, Synchronization, Filesystem access, Processes, Networking.
- Advanced services: I/O Streams, Logging.
- Debugging tools: Stack tracing, Memory Leak detection.
- Gui widgets (Work in progress): Windows,Frames,Layout managers,common controls,advanced controls.
- Generic utilities: complete data structures framework, String class with unicode support.
- Full unicode support: native support to unicode, conversion to/from different charsets.
- And many others: the list is too much long to enumerate all minor but extremely usefull features.
- Cross Platform - Supports various systems and compilers.
- XTKlib is known to work under:
- Windows XP (x86)
- Visual C++ versions 7.1, 8.0
- MinGW32
- Linux (x86, x86_64)
- GCC 3.4
- Compatibility with other platforms and compilers are not excluded.(If you can compile/use xtklib with a non listed compiler/platform let us know about that, thanks)
- Fast - Although performance are not the main goal of this library (exceptions and RTTI have a tradeoff in this meaning), code agility and execution speed are often taken in consideration during development, thus leaving a performance advantage compared to interpreted programming languages(eg. Java,C#) or scripting languages(eg. Python,Ruby,Perl).
Enhancements:
- This is the first release with a working "Widgets" module, although it has only basic features.
- This release is provided for testing and development only.

CrossFTP for Firefox is a versatile Cross-Platform FTP client extension.

This plugin contains two FTP tools: CrossFTP Client and Server. which will appear in the Firefoxs Tools menu:

- CrossFTP Client is a versatile GUI FTP client for multiple platforms. It uses a familiar, Explorer-like interface that even the most novice user can master in minutes.
- CrossFTP Server is a professional FTP Server for multiple platforms. It offers you a high-performance, extremely configurable, and most of all a secure FTP server.

mChess is a simple cross-platform email chess program.

The aim is to be able to play chess with your friends via email using a nice user interface without having a chess board standing in your living room for weeks.

Nemesis Pascal is an Pascal interpreter that is:

Free
Open Source (GPL)
Cross-platform (currently Windows and Linux)

Nemesis Pascal is written in Delphi and Kylix. Borland CLX libraries supplies the cross-platform features.

The Nemesis Pascal applications runs on Windows using native controls, and Linux using the CLX Library (a binding to Qt Trolltech).

Exemple:

unit test1;

interface

implementation

procedure main;
begin
ShowMessage(Hello World!);
end;

end.

Canorus is a free cross-platform music score editor.

Canorus supports an unlimited number and length of staffs, polyphony, a MIDI playback of written notes, chord markings, lyrics, a number of import and export filters to many formats like MIDI, MusicXML, ABC Music, MUP, PMX, MusiXTeX and LilyPond and more!

Canorus is evolving quickly.

uriparser project is a strictly RFC 3986 compliant URI parsing library. uriparser is cross-platform, fast, supports Unicode and is licensed under the New BSD license.
Main features:
- Cross-platform (Unix, Windows, Mac OS X, ...)
- Strictly compliant to RFC 3986 (latest RFC on URIs to date)
- Fast (linear input length time complexity)
- Unicode support
- No external dependencies
- Uses unit testing
- Licensed under the New BSD license
Enhancements:
- This release fixes several bugs revealed by test cases from 4Suite.

Mures project is a cross-platform clone of Segas "Chu Chu Rocket", a multi-player puzzle game.

It is written in C using SDL. Multi-player is handled through a client-server design that supports multiple players per client.