Agenda is described as 'TAKE NOTES. DATE NOTES' and is an app in the Office & Productivity category. There are more than 25 alternatives to Agenda for a variety of platforms, including Mac, iPhone, iPad, Windows and Online / Web-based. The best alternative is Google Keep, which is free. Other great apps like Agenda are Microsoft OneNote (Freemium), Evernote (Freemium), Simplenote (Free, Open Source) and Zoho Notebook (Free Personal).
Dendron is an open-source, local-first, markdown-based, note-taking tool built on top of VSCode. It supports all the usual features you would expect like tagging, backlinks, a graph view, split panes, and so forth.
Bear is a beautiful and flexible writing app for note-taking and prose, both on the go for iOS devices and for the Mac OS desktop. KEY FEATURES - Stay organized by linking notes to each other. - Use hashtags to organize and add context to notes.
Ulysses is a text editor for creative writers. Used by bloggers, poets, students and published novelists all over the world, it offers an integrated environment to brainstorm, draft, revise and even submit text on a professional level.