Stickies - Stickies is a PC utility written to replace Post-It-style notes left stuck to your monitor.
TopXNotes - TopXNotes is a personal notes and information organizing tool that you can use on iOS or Mac OS.
Notezilla - Colorful & powerful sticky notes app for Windows & Phones.
Scrawl - Scrawl is a notes taking and memo app that lets you keep track of the things that are important for you, like daily routine tasks, projects, reminders, calculations, or accountability of someone.
Simple Notes by AngkorWorld - Simple Note is an app by AngkorWorld that offers features that let you write and share your thoughts with other users to help them in learning something new.
Indicator Stickynotes - Floating colourful sticky note windows on your desktop!