Easily generate custom APNG files. APNG Anime Maker can be used to create animated PNG files.
How To Use:
Delay: Enter a number in delay box and click "msec" or "fps" to set the delay time for the selected frames, you can set "All" apply to all frames.
Offset and Increment: Offset is X and Y position at which to render the selected frames, Increment X and Y auto increase the offset for the following selected frames.
Dispose method:
1. None: No disposal is done on this frame before rendering the next; the contents of the output buffer are left as is.
2. Background: The frames region of the output buffer is to be cleared to fully transparent black before rendering the next frame.
3. Previous: The frames region of the output buffer is to be reverted to the previous contents before rendering the next frame.
4. Blend method:
5. Source: All color components of the frame, including alpha, overwrite the current contents of the frames output buffer region.
6. Over: The frame should be composited onto the output buffer based on its alpha, using a simple OVER operation.

Optimize:
1. It optimizes the file size of the animation. It is designed for movie clip with small scene change.
2. Set "Lossy" to have more compression, "Tolerance" affect between file size and quality.
3. Set "Selected Region Only", then drag a region in the image preview with scene change.
4. Optimize will only search in the region selected. It can give more compression for lossy movie.
5. "Selected Image Only" optimize the image selected only.

The license of this software is Freeware, you can free download and free use this animation software.