MeetKeeper turns your MacBook's notch into your calendar. It stays invisible until a meeting is close, then shows a countdown and a Join button. Hover for your whole day, join Meet, Zoom or Teams in one click, and add events or invite people by typing a sentence. Answer invites without opening anything. Works with Google Calendar, Outlook, iCloud and Notion. Native Swift, no account, nothing leaves your Mac. 14 days free, then $9.99 once.
SendKey turns a password, an API key, or a whole file into an encrypted link that opens once, then burns. Sealed in your browser; the key rides the URL fragment and never touches the server. No accounts, no analytics. Open source, self-hostable, free.