What are some alternatives?
When comparing Bopup IM Suite and Feem, you can also consider the following products
Ruler - It's a screen ruler for Windows.
Send Anywhere - Send whatever you want, wherever you want
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
BORGChat - BORGChat is a LAN messaging software program.
Winpopup LAN Messenger - Winpopup LAN Messenger is a cost-effective Office, Corporate, Enterprise Instant Messaging solution.
ShareDrop - HTML5 clone of Apple's AirDrop - easy P2P file transfer powered by WebRTC