I still use ImageReady. Have experimented with TimeLine in PS, but ImageReady is much easier to use.
Rita, thanks for answering my question! I don't do too much animation but I did use ImageReady before (back in PS CS5?). I agree; it is much easier to use.
Sepiana, it's much older than that, came with CS2, and I believe it was already eliminated in CS3. I have never understood why Adobe didn't stick with it. What makes it so easy to use is that everything in it works exactly like Photoshop itself. There was no need to learn new tools and few settings.