Curio is described as 'Innovative and visual application for brainstorming, notetaking, and project management' and is a Note-taking tool in the office & productivity category. There are more than 50 alternatives to Curio for a variety of platforms, including Windows, Mac, Linux, iPhone and iPad apps. The best Curio alternative is Notesnook, which is both free and Open Source. Other great apps like Curio are Zim, CherryTree, Trilium Notes and Cryptee.
OmniGraffle can help you make eye-popping graphic documents—quickly—by providing powerful styling tools, keeping lines connected to shapes even when they’re moved, and magically organizing diagrams with just one click.
Privacy oriented, without vendor lock in note organizer, todo list desktop application. Work offline with text, markdown and pdf files.
WizNote is a Note software, which is especially designed for Internet users and mobile Internet users. WizNote focuses more on notes of rapid collection, management, reading and sharing. WizNote is smaller, more stable, and more suitable for computers, phones and mobile devices.
This application provides as many baskets as you wish, and you can drag and drop.
VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts. Such maps can help you to improve your creativity and effectivity. You can use them for time management, to organize tasks, to get an overview over complex contexts, to sort your ideas etc.
Passfindr is a web based premium Personal knowledge base, Password manager and Bookmark manager application to securely store passwords and other sensitive information in a virtual vault locked with individual master passwords.
MyInfo is a personal information manager for Windows. It will help you capture, organize, edit and share ideas, documents, tasks, and web pages.
End-to-encrypted, laser-focussed yet elegant editor. No registration, no login, no ads, no tracking, no hassle. Just write. In private or together with others.
myBase is a unique free-form database software that allows entry of unstructured text, webpages, images, documents, emails and even arbitrary files without regard to length or format. All information is automatically compressed and stored in the tree structured outline form.
Take beautiful handwritten notes or annotate PDFs on your iPad, and now even on your iPhone. With the new Noteshelf you can do all of the familiar, like type notes, record audio, draw shapes, sketch, sign contracts, fill forms, along with a lot of new, like add bookmarks, create...
A new medium for your ideas—augment your thinking with a text editor designed for structuring lists. Side-by-side views allow 3 modes of thinking.
Scrintal offers a visual approach to brainstorming, merging mind mapping with networked note-taking. Ideal for problem-solving, project planning, and study outlining, it accommodates various file types, tags, and colors, forming a comprehensive knowledge base for writers and researchers.
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It covers many of the diagramming aspects well (is in fact more powerful than Curio in this respect). Not so good in the free-form note taking though.