ocw.mit.edu
Get access to tons of free courses that are been taught in universities and colleges.
musclewiki.com
It will show you 1000+ workouts you can do to gain a muscular body.
docsity.com
Just type the name of your school or university and get access to all their past exams, assignments and homework.
oldversion.com
You can download the old version of any software or tool without paying for it.
virustotal.com
You can scan any file or URL for viruses and threats. It will scan your file with more than 50 different antiviruses.
Summary
1. ocw.mit.edu 2. musclewiki.com 3. docsity.com 4. oldversion.com 5. virustotal.com