LAN/ Intranet video conferencing software that has sharing screen features

I need Intranet video conferencing software together with several features:
1. Screen Sharing (For presentation).
2. File sharing
3. Real-time chat.

Anyone knows about this kind of software?
 I use TrueConf previously, and it was great. But it is to heavy on my laptop and computer.
Nathan HartonoAsked:
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von AxlSystem AdministratorCommented:
You can try this:

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Nathan HartonoAuthor Commented:
Thank you for your Input. However, I'm afraid that the price is too high.
I have also found R-Hub, Cisco, and also Polycom, however, the price is beyond our budget.
Do you have another input?
von AxlSystem AdministratorCommented:
Solution provided.
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Conferencing Software

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