Yii 2.0.23 was released and there is some interesting info about Yii 3 published at OpenCollective page.
Jul 10, 2019
A handler from Yii 2 was ported over and adjusted. The forum post lists cool features it supports:
Jun 17, 2019
Jun 12, 2019
Let’s try to get the best and most active Yii extension builders together and create a community effort to build and maintain an extensive collection of long-term supported, best-practice coded, well-documented, well-tested, multi-lingual, feature-rich Yii 3 extensions.
Join the discussion about community maintained extensions for Yii 3.x - Feedback and ideas are greatly appreciated!