Sticky notes app for Ubuntu

Question

I'm looking for a simple-to-run, simple-to-use sticky notes application for Ubuntu 15.10. It should have the following features:

• Ability to add, edit and delete notes.
• Ability to move notes around
• Ability to have notes on top of other windows
• Note text/position should be maintained after restart
• Should work with Ubuntu 15.10 under Unity.

Answer 1

Check out Tomboy.

It has features that allows syncing to all your computers and devices. There are a couple of syncing services but I use the graupel plugin of Owncloud.

Installation is simple:

$ sudo apt-get install tomboy

Answer 2

If you use Chromium or Google Chrome on Ubuntu, you call install the packaged app Whenever.

It meets most of your criteria, except the note text and position after restart.