List of useful Tools for Web Developers

I’m putting together a list of (limited) free online tools which make my day easier. I’ve personally used all of these, you won’t see anything I do not use. I believe other web developers will find these services as useful as I have! 🙂
Shoot me a message if you know of a website or service I should try out!
(the list is growing each time I get some free time)
Website Speed Test (free)
https://tools.pingdom.com
Favicon generator (free)
http://www.favicomatic.com/
Bulk browser testing (free)
http://browsershots.org/
Site validator (free)
https://pro.letsvalidate.com/
Load Testing (free)
https://loader.io/
Automated uptime status check (free)
https://uptimerobot.com/
WhoIS lookup (free)
https://morganhvidt.com/whois/