Here are most useful websites that can be use in day to day activities

1- www.radio.garden
You can listen radio station anywhere in the world .

2- www.freecampsites.net
If you live on the road,this could be useful.And yes ,it is exactly what it sound like .

3- www.mathway.com
A great site for students,it solves algebra,calculus,and even chemistry problem

4- www.myfridgefood.com
Just check off whats in your fridge and the website will spit bunch of recipies you can make.

5- www.archive.org/web
Find archive version of websites from years ago.Also ,on archive.org you can find a lot of other good stuff like books,movies,etc.

6- www.localingual.com
Listen to people's voices from all over the world.

7- www.noisli.com
Generates background noise to help you while you study and work.

8-www.sleepyti.me
This website will calculate the best times for you to fall asleep so that you don't wake up in the middle of a sleep cycle

Hope this sites will be useful