Hi Delenn myself and Idunno are slowly working on the Free games synopsis. (It's about time, lol).
As Delenn says the above threads are well worth checking out. there are loads of point and click games posted. Each post has a note indicating the genre.
You can get the prequel Samorost 2 and Machinarium free online, plus play it in a browser. We posted The White Chamber way back in Week 5 HERE
Here's a list of the ones I could see just by scrolling fairly quickly. It's not a complete list and I've only highlighted those that have been marked as Point & Click; those marked with the tag Adventure may also be point & click games as well and I've not listed any of those below.
I've starred and posted links to four of the games which can be downloaded for free from Good Old Games, though you need to create a free account first. All four are good quality games that were originally commercial games. The rest that I've listed are all freeware or abandonware.
Amertis
Beneath a Steel Sky* ( http://www.gog.com/en/gamecard/beneath_a_steel_sky )
Ben Jordan: Paranormal Investigations 1 to 7
Ben there Dan that
Bermuda Syndrome
Cedric & the Revolution
Cirque de Zade
Conspiracy of Songo
Cosmo Quest I to III
Cruise for a Corpse
Dragonsphere* ( http://www.gog.com/en/gamecard/dragonsphere )
Escape from the Chaotic City
Eternally Us
Lure of the Temptress* ( http://www.gog.com/en/gamecard/lure_of_the_temptress )
Out of Order
Quest for Yrolg
Tale of Two Kingdoms
TeenAgent* ( http://www.gog.com/en/gamecard/teenagent )
Voodoo
What makes you tick
The White Chamber
5 Days a Stranger
7 days a Skeptic