CherryTree is ideal for students, writers, researchers, and anyone who needs to manage complex information in a structured manner. It is particularly suitable for individuals who appreciate hierarchical organization and who may require the functionality to include various types of content in their notes.
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SQL Fiddle - A tool for easy online testing and sharing of database problems and their solutions.
Joplin - 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, tagged and modified either from the applications directly or from your own text editor.
DB Fiddle - An online tool for testing, sharing and collaborating on SQL snippets
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
db<>fiddle - An online tool for testing, demonstrating and sharing database commands and scripts.
Standard Notes - A safe place for your notes, thoughts, and life's work