If you meet online frequently, this one's a no-brainer -- no sense in being tied to your office desk just to make a 15-minute videoconference. All the more true if you tote a tablet with a front-facing camera -- put it to good use. This is also an area where you can often leverage your company's existing tools without spending additional money. If your employer is a Cisco Webex shop, for example, there's a free Android app. If not, the apps for free (or partially free) tools like Skype or Join.me can come in handy as a low-cost alternative.