I've used Mailplane for years - http://mailplaneapp.com http://mailplaneapp.com Yes, it is "just" a wrapper, but it's nice having Mail and Calendar in a separa

I've used Mailplane for years - http://mailplaneapp.com http://mailplaneapp.com Yes, it is "just" a wrapper, but it's nice having Mail and Calendar in a separate dedicated app. I can restart my browser without impacting my mail, and the integration with the desktop (e.g. mailto: links just work, I can use quicklook on attachments, better drag and drop support, etc.) make it worthwhile.