F4L
The F4L project has halted development pursuant to intellectual property issues regarding the "Flash" product name and other trademark-oriented issues. F4L has transitioned the ambitious open source plane by resurrecting the UIRA project. Development plans include authoring capacity for 2D animation, and tweening, as-well-as output to the .swf and .fla file formats. Flash 4 Linux has recently become UIRA.
The project was being led by a Turkish University student, at the time of inception, by the name of Özkan Pakdil, who wanted to create a unique project for school. Over time, what had started as a simple project evolved into a full fledged application that was capable of authoring 2D animation and output publishing of SWF files. The application layout is very similar to Adobe Systems' Adobe Flash. UIRA hopes that being able to output in the .swf will become a realistic choice and competent alternative to Flash. UIRA aims to provide their product, in accordance to the Open Source Initiative, as a free project in the vein of Flash MX content authoring for the near future.
Development appears to have ceased however.
Read more about this topic: Flash For Linux