Downloading sidenote 1.7.3 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free Mac app was originally created by Pierre Chatel. The application lies within Productivity Tools, more precisely Timekeeping.
From the developer:
Sidenote tries to catch the “Stickies” spirit but in the form of a multi-document drawer that will hide in the corner of your screen (left or right). You can use it to take all your daily notes, include images and easily modify text color and font. Sidenote will automatically expand so that you will be able to drag into it any picture, text clipping or pdf file from the finder or your favorite application.
You may want to check out more Mac applications, such as SideNotes, which might be related to sidenote.