TexturePacker - Texture Packer is hands down the best sprite sheet generation tool on the market.
The Freelance Rate Calculator - Get your minimum viable freelance rate
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.
Worklogs - Easy time tracking for remote teams working on Slack.
Sprite Sheet Packer - Sprite Sheet Packer is online that you can easily use to pack sprite sheets, including data formats for CSS, LESS, and Phaser.
Freelance Rate Explorer - Visualize rates for thousands of freelance designers & devs