Agent HSP puts scripture on the projector as the preacher speaks. It listens to the sermon, finds each verse named or quoted, and shows it in about a second. It also runs the order of service: songs, readings, announcements and backing tracks. Free, and it runs on the church computer without an internet connection.
The installers are not signed yet, so your computer will warn you once.
Windows: when SmartScreen appears, click "More info", then "Run anyway".
Mac: open System Settings, then Privacy & Security, and click "Open Anyway".