Not so awesome images
- Apple Color Emoji - only raster, and unclear licensing (extractor to get the images out of the font).
- Emojipedia sample images - raster and no reuse.
- Designer emojis - from DesignCue
- EmojiOne - nice but now has a proprietary license.
- Github's Gemoji - really just a dump of Apple's emoji with a few additional (custom) raster images.