Are bootstrap themes free?

Related questions

1. Why You Should Use Bootstrap?
2. What is bootstrap web design?
3. Is it necessary to learn bootstrap?
4. Is bootstrap safe to use?
5. What is the importance of bootstrap?
6. Is it bad to use bootstrap?
7. Is bootstrap mobile first?
8. Is bootstrap popular?
9. Does bootstrap require jQuery?
10. Is bootstrap on demand?

Tags

1. #mobile
2. #effectively
3. #latest
4. #websites
5. #optimized
6. #create
7. #themes
8. #largest
9. #powerful
10. #framework
11. #opportunities
12. #responsive
13. #friendly
14. #expected
15. #bootstrap
16. #gives
17. #version
18. #popular