Ask HN: What have you built more than twice and wish someone had built for you?

This page summarizes the projects mentioned and recommended in the original post on

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  • Paperless-ng

    A supercharged version of paperless: scan, index and archive all your physical documents

    A SaaS for managing personal documents. The closest I have right now (not SaaS) is paperless-ng[0], but I have to self-host it, unless I missed a really compelling solution.

    I have a sea of documents, both physical and electronic, and it's always a struggle to scan/organize/find them. I'd pay good money for a software/service that manages my documents, from scanning to archiving.


  • paperless-ngx

    A community-supported supercharged version of paperless: scan, index and archive all your physical documents

    For anybody interested in paperless-ng, this is line one of their repo:

    This project is not dead! Rather, this project is now maintained as a community effort at, a direct continuation of this project and drop-in replacement. Please see their project page and the documentation at for details.

    I really like Paperless NGX.

  • Sonar

    Write Clean Python Code. Always.. Sonar helps you commit clean code every time. With over 225 unique rules to find Python bugs, code smells & vulnerabilities, Sonar finds the issues while you focus on the work.

  • lowdefy

    An open-source, self-hosted, low-code framework to build internal tools, web apps, admin panels, BI dashboards, workflows, and CRUD apps with YAML or JSON.

    Check out they even have a sample survey app as one of their examples.

  • devenv

    Fast, Declarative, Reproducible, and Composable Developer Environments

    I think local reproducible dev environments is a great and less-intense way to get into Nix (the package manager)! is built on top of Nix as well to make it more approachable and user friendly for exactly your use case.

  • devbox

    Instant, easy, and predictable development environments

    Tools like Devbox: are making this way easier. Devbox is powered by nix, but it hides all of the complexity and makes it easier to use.

  • Duplicate-Image-Finder

    difPy - Python package for finding duplicate or similar images within folders

    I found this library worked extremely well for finding and removing similar images Maybe this doesn't fulfill your main and temp folder requirements but worth a try.

  • dmsrs

    A Document Management System, written in Rust

  • InfluxDB

    Access the most powerful time series database as a service. Ingest, store, & analyze all types of time series data in a fully-managed, purpose-built database. Keep data forever with low-cost storage and superior data compression.

  • czkawka

    Multi functional app to find duplicates, empty folders, similar images etc.

    I think this one[0] can do most of that.


  • spec

    Development Containers: Use a container as a full-featured development environment. (by devcontainers)

    Isn't this what Microsoft is trying to solve with dev containers?

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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