A free program for Android, by Axhunter.

Sticky Note + is a must-have application for people who want to easily manage their schedules and notes. With this app, you can easily edit and write notes, memos, emails, messages, and any kind of to-do list. You can also add a widget to your home screen, so you can quickly access notes that you want to open, add, edit, etc. 

In addition, you can organize and classify your notes in different colors and themes. You can also change the background colors, as well as change the sizes of the font, to make it more personalized.

You can share the notes you made through email, SMS, and more. You can also export it to your SD card for backup.