Software

File sharing + sync, notes, and photos (alternative to Nextcloud and ownCloud's RSS reader). ([Source Code](https://github.com/bewcloud/bewcloud), [Clients](https://github.com/bewcloud))

File management and sharing system, supports multiple storage providers. ([Demo](https://demo.cloudreve.org), [Source Code](https://github.com/cloudreve/cloudreve))

File synchronization between computers, servers, external drives. ([Source Code](https://git.joeyh.name/index.cgi/git-annex.git/))

Minimalist JSON storage service with synchronisation and sharing abilities. ([Source Code](https://github.com/Kinto/kinto))

Access and share your files, calendars, contacts, mail and more from any device, on your terms. ([Demo](https://try.nextcloud.com/), [Source Code](https://github.com/nextcloud/server), [Clients](https://apps.nextcloud.com))

File Sharing and Collaboration Platform. ([Source Code](https://github.com/opencloud-eu/opencloud))

Secure File Transfer Program. ([Source Code](https://cvsweb.openbsd.org/src/usr.bin/ssh?sort=File))

All-in-one solution for saving, synchronizing, viewing, editing and sharing files, calendars, address books and more. ([Source Code](https://github.com/owncloud/core), [Clients](https://github.com/owncloud/core/wiki/Apps))

Secure and private space online where you can store, share and view your photos, videos, music and documents. Also includes a calendar, news feed, task lists, chat and email client. ([Source Code](https://github.com/Peergos/Peergos))

Web-based operating system designed to be feature-rich, exceptionally fast, and highly extensible. ([Demo](https://puter.com/), [Source Code](https://github.com/heyputer/puter))

Turn any web server into a powerful file management system and an alternative to mainstream cloud storage providers. ([Demo](https://pydio.com/en/demo), [Source Code](https://github.com/pydio/cells))

Standard Windows interoperability suite of programs for Linux and Unix. It provides secure, stable and fast file and print services for all clients using the SMB/CIFS protocol. ([Source Code](https://git.samba.org/samba.git/))

File hosting and sharing solution primary for teams and organizations. ([Source Code](https://github.com/haiwen/seafile))

File storage, syncing, sharing, and collaboration with real-time editing, permission management, and desktop/CLI clients. ([Demo](https://sync-in.com/docs/demo), [Source Code](https://github.com/Sync-in/server), [Clients](https://github.com/Sync-in/desktop))

Peer-to-peer file synchronisation tool. ([Source Code](https://github.com/syncthing/syncthing))

File-synchronization tool for OSX, Unix, and Windows. ([Source Code](https://github.com/bcpierce00/unison))

Geo-distributed, S3‑compatible storage service that can fulfill many needs. ([Source Code](https://git.deuxfleurs.fr/Deuxfleurs/garage))

Cloud native image registry that stores, signs, and scans content. ([Source Code](https://github.com/goharbor/harbor))

Implementation of the Amazon S3 protocol on the front-end and backend storage capabilities to multiple clouds, including Azure and Google. ([Source Code](https://github.com/scality/cloudserver))

Production-ready vendor-neutral OCI-native container image registry. ([Demo](https://zothub.io), [Source Code](https://github.com/project-zot/zot))

Simple, robust, BitTorrent tracker (client and server) implementation. ([Source Code](https://github.com/webtorrent/bittorrent-tracker))

Lightweight, cross-platform BitTorrent client. ([Source Code](https://git.deluge-torrent.org/deluge/tree/?h=develop))

Simple and user-friendly, breakpoint-resumable peer-to-peer text, image, and file transfer tool based on WebRTC. ([Source Code](https://github.com/david-bai00/PrivyDrop))

Free cross-platform bittorrent client with a feature rich Web UI for remote access. ([Source Code](https://github.com/qbittorrent/qBittorrent))