Being based in PHP, my favourite editors are those that are simple text editors with an FTP clients. My current personal favourite is Coda 2 although Sublime Text is an excellent option and EditPad Pro (with FileZilla) will always have a place in my heart.
For MySQL, nothing is quite as easy as Sequel Pro for playing with databases. I have no idea how anyone survives on MySQL Workbench.
I was introduced to Corel Paint Shop Pro Photo at a young age and it remains my favourite. Obviously Photoshop is a frequent go-to on macs these days.
I initially started out with Classic ASP a long time ago before being introduced to PHP and never looking back. VBScript remains a reliable favourite for some more advanced Windows tasks so is never too far away.
Being a regular Linux user, I am no stranger to Bash scripting to run backups and keep combinations of configurations in check, particularly useful when combined with Git and Ansible.
I typically go with Namecheap for domains for their excellent services and pricing. DigitalOceans DNS hosting is absolutely painless too but sometimes a few different features come in handy from afraid.org.
Typically I prefer to use Firefox as my browser most of the time as it clears its cache very effectively. Its built in developer tools have replaced most extensions I used. Other extensions I use are:
Chrome is good for a few things, namely:
I'm currently looking at using Visual Studio Code with PHP from WAMP to help the autocompletion and Crane for the rest of the magic.
This article has lots of details about customising Visual Studio Code.
Also for visual diff on windows, I'm looking at meld. Mac has a glorious opendiff in XCode