Seald - Keep your conversations secure, everywhere.
Whereby (formerly appear.in) - Collaborate from anywhere - video meetings with no downloads
Brie.fi/ng - Start secure group video chat
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
MeetSpace - Video conferencing for teams that doesn't suck
Xifrem Chat - Client-side encrypted chat with asymmetric encryption