There are many companies, I also run the one which offers home-based job time to time, based on the work it is www.thevasolutions.com

However I suggest, first, you know your niche and then try upwork.com guru.com and freelancer.com You can earn alot from small contracts by sitting at home and completing the tasks. However, you must have skill which is going to be your service for the client.

If you are not sure about where to start, go for Virtual Assistant i.e. VA It just requires some passion and to do attitude. Best of luck buddy.