Hi everyone! I'm Percy, co-founder of Resource Guru. If you're looking for simple team scheduling you may want to check it out. We have some fantastic customers - Publicis, Saatchi & Saatchi, Ogilvy, Razorfish, Yahoo, Vodafone and many more - so you'll be in good company :)
We recently launched webhooks which enable you to create DIY integrations - here are a couple we did with Slack and email:
http://blog.resourceguruapp.com/...http://blog.resourceguruapp.com/...
Invision have just posted this piece about some of the early design decisions we took when we launched - http://blog.invisionapp.com/desi...
Plenty more awesome updates on the way :)
Resource Guru