- Geckoboard, which gives us a really easy-to-set-up dashboard for business metrics, system health, etc.

- Papertrail - fantastic log aggregation service, lets you easily manage, search, etc your logs from disparate sources. Their support has been super responsive as well, great guys.

- google apps for business (email, xmpp)

- campfire (team chat) with propane.app

- AWS (lots)

- pivotal tracker

- concept share (i dont use it much, but a few others at work do)

- sendgrid

- digicert (CA)

- dnsmadeeasy (dns)

looking at possibly using:

- new relic

- airbrake (used to be hoptoad)