ConnectedText is described as 'powerful but simple information management system. It is based on wiki principles and is a free-form note-taking and note-management application that allows you to keep an unlimited number of notes in one or many files' and is a Note-taking Tool in the News & Books category. There are more than 100 alternatives to ConnectedText for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Microsoft OneNote. Other great apps like ConnectedText are CherryTree (Free, Open Source), Zettlr (Free, Open Source), NoteLedge (Freemium) and Zim (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.
Zettlr is a supercharged markdown editor that combines many writing editor features and collect them in one application. It aims at speeding up your workflow and help you write without any interruptions.