An open source cross-platform alternative to AirDrop.
Riftshare
The purpose of this project is to enable everyone to be able to share files privately in real time, without the use of the major tech companies and cloud providers.
SyncThing
Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized. Your data is your data alone and you deserve to choose where it is stored, if it is shared with some third party and how it’s transmitted over the Internet.
qbittorrent
The qBittorrent project aims to provide an open-source software alternative to µTorrent.
Kapin
KTorrent is a BitTorrent application by KDE which allows you to download files using the BitTorrent protocol.