[AshleysBrain]

We make Construct Animate which can do Flash-style animation right in the browser: https://www.construct.net/en/animation-software

[dwild]

At first glance it seems to only support bitmap? I means it does seems great, but I believe a big part of Flash is the vectorial format, it's not baked into the image, and it does look "good" in many resolutions. You can iterate quickly that way.