ethime is an open source Ethiopic keyboard input method that is used to write Ethiopic characters (for languages Amharic, Tigrinya, ...) based on AutoHotKey. The writing system is largely similar to Power Ge'ez (commercial input method), except on the numbers, at which this one is superior.
Writing numbers is extremely easy, you only have to type the number you want and it will automatically be converted to the proper number. So writing, for example 345 will produce ፫፻፵፭. To allow either number system to be used in writing, only the number keys above the alphabet keys are converted. The numbers on the numpad will produce the normal arabic numbers.
When the file is opened, the user can start writing rightaway in Ethiopic using the Power Ge'ez way. When Latin characters are needed, the user can switch to and from Latin Keyboard by typing "/\" (without the quotes). When a switch occurs, a notification on the top left corner shows the current keyboard.
The executables can be foud on the releases page. Download the file and store it wherever you like. Then, if desired, create a shortcut for it on the desktop.