X Sticky Notes expands the meaning of sticky note with many features:
If you do not want desktop get mess by many sticky notes, You can hide your note by dragging it to any edge of your screen, when mouse touch the hiding note's border, it will show again.
You can stick note to window or program, for e.g. document or web page.
You can copy large text or long url text into note.
You can edit the sticky note's title.
You can customize the sticky note's background with any image or color that you want, or add transparency effects.
You can drag & drop files(documents, programs, pictures), folders as note's attachments. the attachment can place anywhere in your texts, double click to open it.

Despite all these features, the zip of X Sticky Notes weighs only 0.7MB, and very low CPU & RAM cost.