Sidenote is described as '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' and is an app in the Office & Productivity category. There are more than 50 alternatives to Sidenote for a variety of platforms, including Windows, Android, iPhone, Mac and Online / Web-based. The best alternative is Joplin, which is both free and Open Source. Other great apps like Sidenote are Standard Notes (Freemium, Open Source), Evernote (Freemium), CherryTree (Free, Open Source) and Zoho Notebook (Free Personal).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.
Colorful & powerful sticky notes app for Windows & Phones. Set reminder alarms, attach them to any website or document, organize them using folders/tags, sync sticky notes between devices & send notes across LAN or to any contact across the globe.
The notes app for creative work. For the research, thinking and planning behind your next great piece of work. # Collect your thoughts Milanote is a place to put it all together. See your ideas, notes and research side by side.