I am looking for a solution to do my online computer trainings to users over the internet. For these trainings I need to share my screen as well as having a platform for the voice and people to ask questions. I don't need fancy stuff like blackboard, etc.
For my previous training I used Yuuguu for screen sharing which works very well and Wiziq for chat/voice (although a bit costly). The very good thing with Yuuguu is that it does not consume my processing resources, however, the maximum number of users is 30.
So, Can you suggest firstly a better all in one solution (screen/voice/chat)? If not a better alternative to Yuuguu (the same price range preferably unlimited number of users) and Wiziq (a free chat/voice preferably). The clients can have any kind of OS and I use Ubuntu and sometimes windows.