FlashJS is an HTML5 game engine similar to Flash.

The engine’s API is very similar to Flash and — wait for it — allows writing ActionScript 3 directly inside <actionscript> tags.

The library looks awesome, but performance concerns ultimately arise, as there is no telling whether a real game with collision detection etc. will work as fast as the demonstrations on the page.

Greensock is an animation framework that brings Flash’s ease-of-use to JavaScript.

Greensock is an animation platform for scripted animation, drawing down the barrier Flash developers may encounter when moving to HTML5, as well as adding Flash logics to JavaScript — which seems to be a good thing in this case.

For more info about what Greensock can do, this great tutorial looks like the perfect thing to start with.

StarlingPunk is a Flash framework built upon the Starling framework (which powers the Facebook version of Angry Birds, by the way!).

StarlingPunk allows reusing code, and comes with numerous awesome tools, such as a collision detection system, entity type management, as well as sprite and particle management.

The one thing that’s missing from StarlingPunk is tile map support; however, implementing this seems to be a top priority for the developer.

LazyFallback is an Adobe AIR application that converts banner ads from .swf to .jpg.

Flash is slowly being put down for the sole reason that it’s not supported by iOS devices, but Flash is still very useful for many tasks, including banner making.

LazyFallback converts swf files to JPGs (actually, a single JPG, but that’s still something), and allows you to do two things: set a delay before ‘screencapturing’ the swf, and set the quality of JPGs.

Flixel is an open-source flash game-making library written in ActionScript 3.

The library comes packed with tons of useful features: collision detection, object grouping, and an uber-optimized engine being the most useful, arguably.

Flixel is still being actively developed, and, so to say, although an omen of HTML5 game development is looming over the horizon, Flash developers are still busy making awesome games with this fine framework.

Speakker is an audio player and interface built upon the projekktor video player.

What’s awesome about this plugin is not the pictured playlist (Tame Impala!!), but the myriad features you can add with just a few lines of code.

Speakker is a great if you’re making a band website, as those require a playlist.

You can, of course, style the player. You can also add social links.

What’s not to love? Speakker even has a Flash fallback.