Microsoft Sticky Notes is described as 'A brand new Sticky Notes for Windows has arrived! Thanks to a new and improved design, added intelligence and Pen support, it is now easier than ever to quickly capture and add context to all your notes' and is a Note-taking tool in the office & productivity category. There are more than 25 alternatives to Microsoft Sticky Notes for a variety of platforms, including Windows, Mac, Linux, Web-based and iPhone apps. The best Microsoft Sticky Notes alternative is Tomboy, which is both free and Open Source. Other great apps like Microsoft Sticky Notes are Notefox, Notezilla, Milanote and Stickies.
It doesn't pin your notes on desktop. It's more like note-taking app not sticky notes.