Keystroke is a text expander for Windows. You type a short code and it becomes the full text, wherever you are typing: email, a browser, Word, anything.

The Keystroke editor. The phrases shown are examples.
The text appears as you type, wherever the cursor is. There is nothing to paste and no window to switch to.
Keystroke types the text in, so it takes on the font you are already using, and whatever you last copied stays on the clipboard.
Today's date in any format, tomorrow's date, a pick list, a short form to fill in. The advanced page shows every one.
Keep your phrases in a OneDrive, Dropbox or Google Drive folder and every PC with Keystroke uses them. Add one on your desktop and your laptop has it moments later. How
Keystroke runs quietly in the system tray from the moment you log in. Its icon is the only sign it is there.
No administrator rights needed. Uninstalling removes everything Keystroke added, and keeps your phrases unless you choose otherwise.
Download and run the installer, and choose where your phrases live. Keystroke starts straight away, and again every time Windows starts.
Click the Keystroke icon in the tray to open the editor. Give the phrase a short code and the text it should become.
Type the code anywhere and Keystroke replaces it with the text. That is all there is to it.
The typing engine inside Keystroke is Espanso, an open source text expander by Federico Terzi and its contributors. Keystroke includes it unmodified, under its GNU General Public License, version 3. Espanso's source code is at github.com/espanso/espanso.
The editor, tray app and installer are Keystroke's own. When a new version of Espanso is released, Keystroke tells you, and a new Keystroke is built around it. Espanso's source code is also on the download page.