List of useful tools and extensions:

Database Management

1. Adminer - Database management in a single PHP file
2. MySQL Workbench
3. SQLeo Visual Query Builder

IDE

• Eclipse
• NetBeans
• PhpStorm
• Extensions
  • SonarLint

Diff and merge

• Meld
• WinMerge

Migration

• Rector - Instant Upgrades and Instant Refactoring of any PHP 5.3+ code

Graphics

• Inkscape
• SVGCleaner - optimize SVGs
• SVG Optimizer
• Squoosh - image compression web app
• TinyPNG - smart WebP, PNG and JPEG compression

Firefox extensions

• Firefox Developer Tools
• uMatrix
• Livemarks
• NoScript
• Laboratory (Content Security Policy / CSP Toolkit)
• Dict.cc Translation

LAMP

• XAMPP
• MAMP

Mindmapping

• VYM
• Semantik

OS

• openSUSE