J (J language) is a high-level, general-purpose, high-performance programming language. J is portable and runs on 32/64-bit Windows/Linux/Mac as well as iOS, Android, and other platforms. J source (required only if Jsoftware binaries don't meet your requirements) is available under both commercial and GPL 3 license. J systems can be installed and distributed for free.

J systems have:

• an integrated development environment
• standard libraries, utilities, and packages
• console, browser, and Qt front ends
• interfaces with other programming languages and applications
• integrated graphics
• memory mapped files for high performance data applications
• Jd