Matter (formerly Project CHIP) is creating more connections between more objects, simplifying development for manufacturers and increasing compatibility for consumers, guided by the Connectivity Standards Alliance (formerly Zigbee Alliance).
Alchemy is a command line tool for modifying and transforming Matter spec documents.
ZAP is Zigbee Cluster Library configuration tool and generator. It allows users to configure their ZCL application using web-like interface and then generate the required artifacts for this application, based upon the templates inside a given ZCL SDK.