MUIbase - MUIbase is a relational, programmable database with graphical user interface for Windows, Mac...
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.
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
Standard Notes - A safe place for your notes, thoughts, and life's work
PortaBase - PortaBase (portable database) is a program for conveniently managing one-table database files.
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.