Virtual classroom with whiteboard, text chat, audio chat. You can upload images to the whiteboard, draw, and enter text. No registration required. Words on iPads as well as web browsers.
Limitations: No video chat. No option to upload a PPT or PDF.
Create collaborate workspaces that include a wiki-like shared note space, screen sharing, and video chat.
Limitations: 10 people can video chat at the same time. Another 20 people can participate in the conference without video.
This virtual classroom/web meeting application allows you to meet with up to 200 people for free. You can video chat, share your screen, run polls, and present PowerPoint shows.
Social network for language learning based on the premise of living in a town with other learners of that language. Includes various means of communicating, including forums and voice chat. Also includes language learning resources.
Video and text chat. You do not need to create an account--just share the link. You can also watch online videos together, including Netflix and YouTube.