Apps similar to NoStash include Super Productivity, which is free and open source. Other options are Logseq, Zim, TiddlyWiki and CherryTree. There's no shortage of Note-taking Tools like NoStash, with more than 100 alternatives for the web, Windows, Mac, Linux and iPhone.
A modern note-taking, list-making and writing app with markdown rich-text editing, powerful customization, a beautiful interface, a dark theme, and much more.
Australia
TakeNote was made by developers for developers - a simple, plain-text note-taking app for the web with Markdown support. What you see is what you paste. No WYSIWIG, no formatting pasted from the web, and no features you don't need or want.
United States
Visual Outliner is an outliner software for Windows, and it uses OPML as native file format. It's not just another tasklist application, but a real outliner editor that can be used to write, view, modify, and maintain hierarchically arranged text.
BlueSpice is your tool for documentation and centrally collecting and sharing knowledge. BlueSpice turns Wikipedia’s popular software engine MediaWiki into a fully-fledged EnterpriseWiki solution.
Germany
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Spiral is a program that allows users to take notes in a format similar to a spiral notebook. Unlike traditional word processors and text editors that are configured in a way that makes it difficult to document things in a non-linear fashion, Spiral pages allow users to click...
Plone is an open source content management system based on the Zope application server, written in python. Its known to be powerful, reliable, secure and easy to use. Plone excels when compared to other content-management systems in standards conformance, access control...
United States
TiddlyWiki for Windows. A unique non-linear notebook for capturing, organising and sharing complex information. ATWiki is an independent project of TiddlyWiki.
Fidus Writer is an online collaborative LaTeX editor especially made for academics who need to use citations and/or formulas. The editor focuses on the content rather than the layout, so that with the same text, you can later on publish it in multiple ways: On a website, as a...
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Ema Personal Wiki uses Markdown to freely create and manage structured notes, like a website. Using WikiWords you can create notebook with linkable pages for tracking your notes, todo lists, bookmarks, your life - in the most flexible way.
Bean is a small, easy-to-use word processor that is designed to make writing convenient, efficient and comfortable. Bean is lean, fast and uncluttered. It starts up quickly, has a live word count, and is easy on the eyes. Also, Bean is available free of charge.
United States
Noto is a modern writing app. With delightful interactions, powerful editing tools, and a beautiful design, Noto helps you capture the best of your everyday life.
Tiki Wiki CMS Groupware is a full-featured, web-based, multilingual (40+ languages), tightly integrated, all-in-one Wiki+CMS+Groupware, Free Source Software (GNU/LGPL), using PHP + Smarty, MySQL, Zend Framework, jQuery and Bootstrap.
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