What are some decent-paying online jobs that can be done on your own time?

I am looking for online working opportunities that don't require a fixed schedule. They should also pay a decent amount (at least minimum wage--no slave labor). My schedule is wonky and I need work that can be done on my own time when I am able to do it.

I'm currently looking at Appen and Lionbridge for things like search engine and social media evaluator and transcription work, but I would really like to have some back-up ideas as well just in case. Is there something I may not have considered?

Thanks in advance!