This single executable allows you to use Notepad as your editor any time Git requires one (commits, interactive rebase, etc).
Just copy GitPad.exe to a folder and double-click on it. It will install itself into your Application Data directory (%AppData%) - if your default editor is not set, GitPad.exe will set itself to EDITOR via setting an Environment Variable on your user profile.
GitPad requires .NET 2.0 or higher.