Pocket Scanner - Pocket Scanner is the best app for quickly scanning documents to JPEGs or multi-page PDFs.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
PaperScan - PaperScan Scanner Software is a powerful TWAIN & WIA scanning application centered on one idea: making document acquisition an unparalleled easy task for anyone.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
PaperSave - PaperSave is a complete document management, electronic workflow and transaction (invoice and gift) automation solution, for Microsoft Dynamics and Blackbaud.
iTerm2 - A terminal emulator for macOS that does amazing things.