folia is described as 'Folia is the professional way to share documents for feedback and discussion. Stop printing, avoid lengthy email threads, modernize meetings, and more. Our state of the art annotation and commenting tools enable deep conversations, so you can be more effective with your content' and is an app in the Office & Productivity category. There are more than 100 alternatives to folia for a variety of platforms, including Windows, Online / Web-based, Android, Mac and iPhone. The best alternative is Joplin, which is both free and Open Source. Other great apps like folia are LibreOffice - Writer (Free, Open Source), Standard Notes (Freemium, Open Source), Notion (Freemium) and Microsoft OneNote (Freemium).
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.
With so many tools, it's hard to keep everyone on the same page. Notion is a new tool that unifies them all. It's like Google Docs, but everything is organized and discoverable by your team. Real collaboration in real-time.