I recently acquired and have been using a free software called Tangle ( designed specifically for small businesses, which has proven really beneficial in my business, so thought I'd share here.

Essentially, you say "Hi John" and only John will hear your message (none of the others in your team) and you can commence a dialogue with John. It also has transparent avatars at the top of your screen, so you can see who's on the phone and who's away from their desk.

It's saved me quite a bit of time, as quick questions can be resolved in 30 seconds, rather than a 5-minute phone call.