NoStash is described as 'web app to keep your notes organized and searchable, is indie, ethical and future proof. Indie: developed by a tiny team without funds. Ethical, your privacy and your notes are before everything else. Future Proof: the founder use it' and is an app in the Office & Productivity category. There are more than 100 alternatives to NoStash for a variety of platforms, including Online / Web-based, Windows, Mac, SaaS and iPhone. The best alternative is Obsidian. It's not free, so if you're looking for a free alternative, you could try Notion or Microsoft OneNote. Other great apps like NoStash are Evernote (Freemium), CherryTree (Free, Open Source), Zim (Free, Open Source) and NoteLedge - Creative Notebook (Paid).
Encryptic is an open-source note-taking application heavily focused on encryption. When you start writing, no one will know what you write except for you. We don’t know and we don’t want to know. That’s between you and your work.
Quiver is a notebook built for programmers. It lets you easily mix text, code and Markdown within one note, edit code with an awesome code editor, live preview Markdown and LaTeX cells, and find any note instantly via the full-text search.
SlimWiki is an easy to use knowledge sharing platform for teams. With a beautifully simple editing experience, including easy management of images, videos and attachments, your team will be able to quickly share knowledge like never before.