In 4th place: 

Redphone☎️ ($3,000 in ) - Pseudozack @citlayik 

An end-to-end encrypted, IMP powered telephone for your lightning node. p2p, no server, no middleman. (A crowd favorite!)

https://t.co/0P4zUiLlUx -

 https://t.co/HvAsV57bfq