Enlarge / Mimestream's got a lot of direct Gmail integrations, but its own Profiles separation is quite useful. (credit: Mimestream) When I searched for the best Mac email clients for Gmail/Google Apps users in September, I was surprised to find that there was an app built specifically for this purpose. You didn't need to customize it, change its settings, or bolt on a bunch of extensions to make it work and feel right; Mimestream was both deeply hooked into Gmail and very much a Mac app. Mimestream spent more than three years in a free beta period, releasing more than 220 updates for 167,000 users and adding more than 100 features.