CloudKick ( http://cloudkick.com http://cloudkick.com ) - Configurable server monitoring with SMS alerts. Love this service. CoTweet ( http://cotweet.com http:

CloudKick ( http://cloudkick.com http://cloudkick.com ) - Configurable server monitoring with SMS alerts. Love this service. CoTweet ( http://cotweet.com http://cotweet.com ) - Shared Twitter account management. Great for support and guerrilla marketing. Uservoice ( http://uservoice.com http://uservoice.com ) - User feedback and support management. Dropbox ( http://dropbox.com http://dropbox.com ) - File sharing - we share the business dropbox with our individual dropboxes to share files. Droplr ( http://droplr.com http://droplr.com ) - Screenshot capture and sharing. Also allows for file sharing. As mentioned by others: GitHub ( http://github.com http://github.com ) - VCS Google Apps ( http://www.google.com/a http://www.google.com/a ) - Email and documents. Pivotal Tracker ( http://www.pivotaltracker.com http://www.pivotaltracker.com ) - Project management and issue tracking. Wordpress ( http://wordpress.com http://wordpress.com ) - Blog. These are very specific to Rails, but extremely useful: New Relic RPM ( http://newrelic.com http://newrelic.com ) - Deeply integrated Ruby on Rails app monitoring and performance measurement. Immensely helpful for troubleshooting and analysis, including slow query detection/explanation, etc. Hoptoad ( http://www.hoptoadapp.com http://www.hoptoadapp.com ) - Rails exception monitoring and alerting.