Slackmojis - A directory of the best custom slack emojis
TexturePacker - Texture Packer is hands down the best sprite sheet generation tool on the market.
My Slack Emoji - Turn your team photos into Slack emoji's
ShoeBox - Free unlimited photo storage, so you can rediscover your photos anywhere. Available for iPhone, iPad, Android, Mac and PC.
Emoji Engine - A search engine for emoji 🔎
Free Texture Packer - Free Texture Packer is an open source tool that allows you to pack multiple images into one atlas for you games or sites.