Don't have expensive video conferencing gear? Hangouts, Google's online collaboration tool, lets you hold a video meeting with up to 10 participants. It's handy for running slideshows with clients, customers, and anyone else outside of your organization. And because you can add a Google Docs file to your meeting, Hangouts is handy for collaborative editing sessions with colleagues. With the Google+ app, iPhone and iPad users can join the conversation; naturally, there's a version for Android users, too.