Monkkee is described as 'Keep a private journal securely on the Internet – to provide a convenient user experience your personal online diary Monkkee offers you a variety of features… and it’s free!'. There are more than 25 alternatives to Monkkee, not only websites but also apps for a variety of platforms, including Windows, Android, iPhone and Linux. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or CherryTree. Other great sites and apps similar to Monkkee are Cryptee (Freemium, Open Source), Milanote (Freemium), Notejoy (Freemium) and MemPad (Free).
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.
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.
A simplified, RedNotebook-type journal/diary app. With a focus on minimal design and a distraction free writing environment. Makes a folder full of dated text files that are easy to access even without the journal program.