Gluebox is described as 'free platform independent Wiki-like notetaking and information gathering tool with a strong focus on project documentation and document management' and is an app in the Photos & Graphics category. There are more than 100 alternatives to Gluebox for a variety of platforms, including Windows, Android, Mac, iPhone and Online / Web-based. The best alternative is Joplin, which is both free and Open Source. Other great apps like Gluebox are Standard Notes (Freemium, Open Source), Microsoft OneNote (Freemium), Evernote (Freemium) and Simplenote (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.