Invision - Prototyping and collaboration for design teams
Bashupload - Upload files from command line to share between servers
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
FilePizza - Open source application used to transfer file via WebRTC and WebTorrent.
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
BlackHole File Transfer - Blockchain-based file transfer. Designed for everyday use.