I want to point to some developer activity in the Micro.blog community. The first is a macOS Today Widget called TodayPoster by Bryan Luby. It gives you a text box to post directly to Micro.blog-hosted blogs from the macOS Notification Center.
The next is a Mac client built with Electron. Developer Matthew Roach has a blog post about it with a download link.
There’s another iPhone app in development as well. It’s not ready yet, but from a screenshot by Francisco Cantu, looks like it will be a good alternative to the official Micro.blog iPhone app.