WinCompose - WinCompose supports the standard Compose file format.
CheatKeys - View Windows keyboard shortcuts in the current application.
BabelMap - Unicode Character Map for Windows
Hotkey Commander - Find out and override what hotkey combination is registered by which application.
Event Viewer - Get help, support, and tutorials for Windows products—Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.
KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.