IDEs

PHPStorm

IntelliJ

PyCharm

Version Control

Git Kraken

Git GUI client for Windows, Mac and Linux - like Tortoise Git only better. For more information visit the Gitkraken site.

Gitflow

nvie/gitflow on Github and the Gitflow Cheatsheet as the ideal companion.

Virtualisation

Docker

Docker-Compose

Kitematic

With Kitematic you can manage Docker containers via GUI

Text Editors

Remarkable

Atom

Sublime