MailCraft

This is a clean-room reimplementation of the mail client people already know how to use: the ribbon, the folder pane, the message list with its reading pane, conversations, flags, categories, rules, a calendar with recurring meetings, people and to-dos. It is a native, GPU-rendered app (no Electron, no web view), it also runs in a browser tab through WebAssembly, and every action in it is a command that scripts and AI agents can run too.