Apps with 'Sync with Dropbox' feature
diagrams.net (previously draw.io) is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams.
An open source note taking and to-do application with synchronisation capabilities.
A desktop personal wiki with inline preview as-you-type and lots of plugins.
Standard Notes is a simple and private notes app. It allows you to write and sync your notes across all your devices, including your iPhone, iPad, Mac, and web browser.
Keepass2Android is an open source password manager application for Android. It reads and writes .kdbx-files, the database format used by the popular KeePass 2.
Web and desktop password manager compatible with KeePass. Works online in any modern browser or as a desktop app for Windows, Mac OS X and Linux.
Fast and very secure digital asset management platform with a user-friendly interface. Allows you to customize download links with your brand's style and logo. Controlled access to all your digital files-anytime, anywhere,on any device and more.
Mount NAS, Router, Google Drive, OneDrive and Dropbox to a network drive on File Explorer. No need for synchronization and no need for web browsers!.
Enpass offers you freedom from remembering too many passwords and other important credentials.
Dash is an API Documentation Browser and Code Snippet Manager. Dash stores snippets of code and instantly searches offline documentation sets for almost any API you might use.
As reported by several news articles, old Android versions of Camscanner were infected by malware and removed by the Google Play Store. Android Police verified that versions released between June and July 2019 included that malware, newer versions are safe: https://www.androidpolice.com/2019/08/28/camscanner-play-store-malware/ Anyway uninstalling the app and looking for an alternative is suggested
Your portable scanner. Use your camera to get high quality scans of paper documents, receipts, notes and more. Anytime, anywhere.
A simple journal application for the Mac, iPhone, and iPad.
CarotDAV is a Simple WebDAV / FTP / SkyDrive / DropBox / GoogleDrive / Box / SugarSync client for Windows OS, available free of charge. It is also able to read GoogleDocs or IMAP.
You can keep notebooks stored in plain-text and have them synchronized with a directory on your mobile device, SD card, Dropbox, or over WebDAV.
n8n is a free Node-based source-available Workflow Automation Tool. It can be self-hosted, easily extended, and so also used with internal tools.