Created in 2010 but still interesting.
30 Amazing Remote Desktop Sharing and Screen Sharing Applications
Source post has links, description, and image.
List sorted alphabetically with links below the line.
Adobe Acrobat – CONNECTNOW – Free
Mikogo, Free screen sharing for people and businesses – Free
ScreenStream Screen Broadcasting Software – Free
TeamViewer – the All-In-One Solution for Remote Access and Support over the Internet – Free
Yuuguu – Instant Web Conferencing, online meetings and collaboration – Free
