Student Lance is a site for online tutoring that I just found out about from one of my readers. This is a nice site that allows for students to post requests/questions for problems in subjects they are looking for help in. Tutors/teachers can then answer these requests and even charge how much it 
Jukeboxlessons is a new site for online learning/tutoring. The way this works is a educator can sign up to teach any subject/lesson and charge what they want. Students then can browse and find what they want to learn from educators around the world. This is all done either through Skype or Google Hangouts.
Universal Tutors is a new (beta) site for students or educators to find or become a tutor. There are lots of sites that offer this but what I like about UT is that the online environment allows for audio/video chat, instant messaging, and an interactive whiteboard w/ the Wolfram Alpha equation engine built in (ideal for math equations).