This blog post announces the release of Flipper Zero firmware version 1.0, highlighting major new features like dynamic app loading, a redesigned NFC subsystem, JavaScript support, and various system improvements.
Watchy is an open source E-Ink Smartwatch with an MIT license. Development resources and documentation can be found on the official website watchy.sqfmi.com. There are also several retailers selling the watch hardware. See the documentation for instructions on how to get started with developing for Watchy.