It's been a while since the last release because we primarily focus on the PowerShell Gallery.
sleepygary is a nice and stable release that has a tons of bug fixes, over 400 commands, and newly beefed up snapshot commands. You can read more at dbatools.io/snapshots
Since the last release, we also created a bunch of awesome Extended Events commands. You can read more about the included these at dbatools.io/xevents. Chrissy and Gianluca also did a presentation at SQLBits about it. You can find the slides at sqlps.io/xecode.
Also included are a ton of perfmon commands (DbaPf), but those don't have an associated blog post yet.