Dev tools · alternatives · 2026

OpusNota is a global open library designed to collect and share student papers, essays, theses, and study notes across all languages. The platform is built for students who want to access and contribute academic work… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Learning to code, my first CRUD web app launched in 2016; newer entries below may have overtaken it.

1. 1
   OpenNotas▲379

   The best personal note-taking app, fast, secure & free

   2024 · opennotas.io · its alternatives →

2. 2
   Notea▲288

   Free self-hosted open source note taking app, like Notion

   2021 · cinwell.com · its alternatives →

3. 3GC
   Ghostnote – Contextual notes and todo app▲301

   Add notes to applications, folders, documents and websites

   2015 · ghostnoteapp.com · its alternatives →

4. 4
   Heptabase▲443

   The visual note-taking tool for learning complex topics.

   2023 · heptabase.com · its alternatives →

5. 5
   note.md▲280

   your notes and research documentation now a local LLM Memory

   Jun 2026 · notemd.org · its alternatives →

6. 6IM
   I made a site where students can create and share flashcards and notes▲133

   2020 · barbra.io · its alternatives →

7. 7
   ScholArxiv – an open-source, aesthetic, minimal research paper explorer▲147

   OpenScholarXIV is an open-source, aesthetic, minimal and AI powered app that allows users to search, read, bookmark, share, download and view summaries of academic papers from the arXiv repository. - ScholarXIV/OpenScholarXIV

   2024 · github.com · its alternatives →

8. 8CO
   CrushPaper – Open-Source Workflowy and Evernote for Writers, Students▲56

   2015 · crushpaper.com · its alternatives →

9. 9
   Student OS▲308

   Your buddy in everyday student life

   2023 · matthewnotion.gumroad.com · its alternatives →

10. 10
    RemNote Community▲136

    Share, discover, & collaborate on study notes and flashcards

    2023 · remnote.com · its alternatives →

11. 11
    Curvenote (YC W21)▲101

    Write, share & remix ideas from Jupyter Notebooks

    2021 · curvenote.com · its alternatives →

12. 12
    Notebuddy▲124

    The second brain for students

    2022 · notebuddy.typedream.app · its alternatives →

13. 13
    Open Notebook▲144

    Open Notebook is a tool where you can upload your own sources - PDFs (textbooks, research papers), Github repos, documentation websites, and other URLs. Once uploaded, you can either chat with an AI about them or run “apps” on top of those sources. Apps can be anything. Right now, I’ve built the following: - turn articles into short video overviews - create a mind map of the source - create summaries or other reports about the source - generate quizzes or flashcards to help study the source You can also remix existing apps or create one from scratch. I built this because I wanted to make…

    2025 · noodleflow.ai · its alternatives →

14. 14
    OPUS▲7

    Open source knowledge base application for Teams

    2018 · github.com · its alternatives →

15. 15
    Slay School▲154

    Turn your notes into flashcards, essays & audio in seconds

    2024 · slayschool.com · its alternatives →

16. 16CW
    Community-written abstracts for research papers▲79

    2024 · tldr-ai.org · its alternatives →

17. 17
    MetaNote▲77

    Add notes to any page on the web and share

    2022 · its alternatives →

18. 18
    Shelf▲93

    Save, organize and annotate learning resources.

    2021 · shelf.so · its alternatives →

19. 19
    Benotes▲65

    Open source web app for your notes and bookmarks

    2021 · github.com · its alternatives →

20. 20OC
    One-click citations for your essays▲65

    2014 · speedcite.com · its alternatives →

21. 21
    Manuscripts.app▲87

    For academics who have outgrown the spreadsheet tracker

    May 2026 · manuscripts-app.com · its alternatives →

22. 22
    Notes OS▲85

    Effortlessly organise your courses, assessments and tasks

    2023 · notesbyhugh.gumroad.com · its alternatives →

23. 23
    Collate: Cross platform note taking app based on plain text data format▲85

    Welcome to the Collate Blog! As our first blog post, let’s kick things off with the...

    2017 · collatenotes.com · its alternatives →

24. 24
    Occasio®▲85

    Pinboard meets citation manager for shared insights.

    Aug 2026 · occasio.cc · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →