Anim2Anim

This is not really an effect but rather a shortcut.
Using this tool, you'll be able to convert any animation recognized by ImageFX into an AnimGIF, an animation which will work on your browser (and so, on Internet too).
Anim2Anim can work on more than just one single animation at a time, generating a new AnimGIF for each animation you will add to the ListView.
Let's have a look to Anim2Anim interface:

First of all, you have to Drag & Drop the animations inside the ListView at the top of the Window. If you don't like Drag & Drop you can always use the Add gadget which will open an usual File Requester.
Then you have to specify the Destination Directory where the new AnimGIFs will be saved. The new anims will have the same name of the original file, with .GIF added in the tail.
WARNING: no overwrite check is done before saving!
As usual, you can always Drag & Drop an existing directory or device, which will be used as destination dir.
With the Skip gadget, you can specify how many frames will be skipped in the original anim while creating the new AnimGIF.
Please, check the Delete Last 2 Frames checkbox if you are going to convert an Amiga Anim animation, because the last two frames of this animation are the same of the first two.
As usual, set the final Width and Height and Depth of the final AnimGIF and press Execute!.

Here there is a typical example of Anim2Anim at work: this is an animation (Amiga Anim7) converted into an AnimGIF using WebFX.

Some Tips

Optimize Size
You should remove all the blank space around the animation, to save download times.
Use Anims, not AnimBrushes
It seems that ImageFX does not like AnimBrushes very much, but works smoothlessly with Amiga Anims.
If, during the convertion, ImageFX crashes, try saving the animation using Deluxe Paint or Brilliance