1. 10 Minute Mail

Maybe you want to sign up for a site which requires that you provide an e-mail address to send validation e-mail to. And maybe you don’t want to give up your real e-mail address and end up on a bunch of spam lists. This is nice and disposable.

2. Flightradar24

Flightradar24 is a global flight tracking service that provides you with real-time information about thousands of aircraft around the world. Flightradar24 tracks 180,000+ flights, from 1,200+ airlines, flying to or from 4,000+ airports around the world in real-time.

3. Hotel Wifi Test

Nothing worse than staying at a hotel where wi-fi speeds and reliability just don’t cut it. Here’s a site that is to your rescue.

4. FlagWaver

A web app for simulating a waving flag.
Features
-Upload images from the web or from your device.
-Supports flag cloths with different aspect ratios.
-Set the hoist side and flag orientation.
-Try out different flagpoles.
-Adjust wind speed and direction.
-Progressive Web App support.
Github: https://github.com/krikienoid/flagwaver

5. The Scale of the Universe

The Scale of The Universe shows everything from the smallest to largest things in our universe. Check out the Scale of The Universe right now! Amazing to see