TexturePacker - Texture Packer is hands down the best sprite sheet generation tool on the market.
Grid Diary - The simplest way to get started with keeping a diary
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.
Mini Diary - Simple and secure journal app
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.
Daily Minded - The easy way to maintain a journal, diary or captain's log.