QuickNote is described as 'Virtual scrapbook for Desktop with a plain text editor. With Quicknote, in its resizable window you can jot down your notes and organize them in categories' and is an app in the Office & Productivity category. There are more than 100 alternatives to QuickNote for a variety of platforms, including Windows, Mac, Linux, Android and Online / Web-based. The best alternative is Notepad++, which is both free and Open Source. Other great apps like QuickNote are Joplin (Free, Open Source), Standard Notes (Freemium, Open Source), Microsoft OneNote (Freemium) and Vim (Free, Open Source).
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.