YoYo Games has made available the GameMaker Studio 2 v2.3 Beta. This update includes:

• new Sequences and Animation Curve asset types
• a streamlined project format
• the resource tree is now the Asset Browser with new ways of creating, managing, tagging, and filtering your assets
• many GML changes introduced in this blog post

Developers interested in the beta should apply at the bottom of the announcement blog post here.