If you can get used to the weird layout of the arrow keys (which takes a week or two), check out the Vinpok Taptek.

I have tried nearly every single option listed here thus far, and some that haven't been. Here's what I will tell you: They are all terrible. None of them works precisely as they're supposed to and all of them have stability and syncing issues with IMAP. Of them all, Airmail is definitely the most feature rich, but it's also quite buggy. The most stable and reliable is Mail.app, but it frequently gives me problems syncing my Exchange account. I absolutely love Nylas N1, but it's just not ready for prime time. It's lightning quick, but it's missing many essential features. Basic search doesn't even work at this point. Polymail is frankly underwhelming. Postbox is just a Thunderbird clone with cute but useless enhancements. Frankly, I'm putting my hopes on CanaryMail, the new Sparrow knock-off coming soon.

http://canarymail.io/

Macaw was buggy but it wasn't shit. And yes, it didn't give you production-ready code, but it gave you code close enough to production that it took only a half-hour to get it ready once it was output.

This sucks. I didn't Kickstart this app for it to disappear before a single major update. I also hate SAAS, which forces you to pay in perpetuity for what you should be able to pay for and download once. I also HATE HATE HATE browser-based apps like Invision. I'm pretty ticked off right now.

Chrome for personal. Chrome Canary for development. It has the best dev tools, though I do like Firefox Developer Edition.

Update: After playing with Safari a bit more, I believe it does in fact have superior developer tools.

It's a Mac app-wrapper for Google Inbox I believe.

I mostly use Alfred.

Finder iTerm Authy Dashlane Chrome Apps Chrome Chrome Canary Tweetbot Fantastical Wunderlist Evernote Mail Slack Textual Atom Dash Codekit Paw Tower Transmission Folio Photoshop Illustrator Indesign ImageOptim Sketch VMWare Fusion Spotify Settings

It's nice but, who cares? Why are you developing in Safari? It has a third of the browser market share of IE 8! Do you do mobile dev on a Blackberry? Firefox Developer Edition & Chrome Canary's responsive dev tools are excellent, FWIW.

There is no such thing as bug-free software. You can test and test and test before a release and never encounter or be able to replicate a bug that others run into after release. That's why, instead of pursuing the fantasy of a bug-free release, you should encourage the real possibility of frequent updates. That said, Adobe CC — which thankfully does update more frequently than Sketch — is still infinitely more buggy than anything else I use regularly.