Free Remote Controlling software

Lepide Remote Admin
We give you complete access to control as many endpoints as you require through a centralized platform. You can access Windows services on the remote computer and send wake up request to unattended computers

NoMachine
NoMachine (free) allows one connection. Hence it is for individual use. If you are connecting to your desktop remotely, you will not be able to have a friend connect at the same time.
NoMachine vs TeamViewer: Playing a video, side by side

TeamViewer meetings [or Presentation] on a LAN connection
You can use Presentation Mode in TeamViewer 6. I tried it in new versions and it did not work. You can get old versions of TeamViewer from OldVersion.com, OldApps.com or FileHippo.
* Why use "meeting" ?
Because it allows you to share specific application window only

NoMachine
older versions and why you might need it:
Need suggestions for NoMachine replacement for remote desktop access over the web

How to hide the notifications of the Teamviewer (silent use)

TeamViewer (free for non-commercial use)
www.teamviewer.com/download/index.aspx

How to use TeamViewer on your local network
http://support.teamviewer.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=40
Note: Not applicable to Quick Support version

Can TeamViewer be used within a local network (LAN) only?
www.teamviewer.com/en/kb/40-Can-TeamViewer-be-used-within-a-local-network-LAN-only.aspx
* open TCP port 5938 on host if firewall is used

Ammyy Admin (free for non-commercial use or trial)
www.ammyy.com

ManageEngine Desktop Central (free edition)
Free for 25 Computers & 5 Mobile Devices