https://regex101.com/ is pretty useful if you need to write regular expressions. You can also just paste in any regex and it tells you what each part does.
http://www.fantasticfiction. com/ Well-organized site to find something to read or follow your favorite author. It notifies me when new releases are happening. We mark the books that we’ve read just in case we forget where we are in a series.
https://10minutemail.com/ Free Temporary Email Why would you use this? Maybe you want to sign up for a site that needs you to provide an e-mail address. Maybe you don't want to end up on a spam list. This is disposable. And free!