1 https://fast.com/
2 https://www.virustotal.com/
3 https://haveibeenpwned.com/
4 https://privnote.com/
5 https://pixabay.com/zh/
6 https://tinypng.com/
7 https://www.pdfescape.com
8 https://www.codecademy.com/learn
9 https://undraw.co/
10 https://alternativeto.net/
