List from 2014, but still relevant. The list in brief (spoiler alert):

Remote-Work Specific

1. FlexJobs

2. We Work Remotely

3. Working Nomads

4. Staff.com

5. Skip The Drive

6. Virtual Vocations

Tech

7. Authentic Jobs

8. Dribble

9. AngelList

10. Stack Overflow

11. Ruby Now

Freelance and Contract

12. SkillBridge

13. Fiverr

14. oDesk

15. Guru

16. Elance

17. Freelancer.com

18. Freelancermap.com

General

19. The Muse

20. Indeed

21. Idealist

22. Career Builder

23. Monster

Direct Selling

24. Beauty: Avon

25. Jewelry: Stella & Dot

Bonus!

26. PowerToFly

Full Article – still worth a read for context: http://skillcrush.com/2014/10/10/sites-finding-remote-work