Survey tool specifically for scheduling. Could be used between faculty and students to schedule small or large group online meetings or calls. Could be used between students to schedule sessions for group work.
Slideshare presentation about building community within online courses. This point was repeated many times in "The Online Teaching Survival Guide" by Boettcher
Non-profit organization that provides reviews of electronic educational tools. There are reviews of learning management systems or example that include details of their features and tools.