It's a bundle of documentation of languages, projects and other stuff. Easily searchable and can be used offline. https://devdocs.io
Easily test APIs, AJAX requests with postman (Chrome App): https://www.getpostman.com/
@kartolo: devdocs.io is also available offline. :)
We use a .editorconfig file in our projects in combination with a PhpStorm plugin to enforce CGL for all type of files. EditorConfig is available for a large number of editors and IDEs. http://editorconfig.org
HeidiSQL for Windows as alternative to SequelPro: http://www.heidisql.com/
Alfred Workflow for translation: http://www.packal.org/workflow/leo-dictionary
cross platform git gui client: https://www.gitkraken.com/
css vocabulary: http://apps.workflower.fi/vocabs/css/en
css3 media queries cheatsheet: http://mac-blog.org.ua/css-3-media-queries-cheat-sheet/
devdocs.io workflow for alfredapp: http://www.packal.org/workflow/devdocs
See changes in commit message:
git commit -v --status
Standalone Clipboard Manager
Oh My Zsh
http://ohmyz.sh/
Command Line Power User by @wesbos
For offline documentation on Mac I can recommend Dash App. It costs a bit, but works perfectly :) There's a workflow for Alfred too, so you can search in Alfred.