Is there a society of thinking and free droids in the Old Republic? In the Star Wars galaxy, is the threat of a technological singularity ever speculated on? Is there a planet sized A.I. machine and finally-artificial animal intelligence?
Is there a planet sized A.I. machine and finally-artificial animal intelligence?
Sort of and sort of.
In X-Wing series of books, there is a project Chubar by scientists working for warlord Zsinj, who manage to significantly elevate the intelligence of various less-intelligent species. They produce a genius-level intellect in Gamorrean (whose baseline as species is near-idiocy); and a good intelligence in an Ewok (who are known to not be intelligent enough to pilot a starfighter, ordinarily).
As far as AI machine, depends on the size you care about
There was an "asteroid-sized" (it was said to be slightly bigger than "Executor SSD") drednaught called "Eye_of_Palpatine" which had an AI controlling it called The Will. It was featured in "Children of the Jedi" book. It was Palpatine's first superweapon and precursor to Death Stars.
If you go slightly smaller, "X-Wing: The Bacta War" had Alderaanian War Frigate "Another Chance" and its Thranta-class War Cruiser Valiant ; both were flown automatically. Whether there were true AIs flying them isn't made clear.
No, not in the Old Republic itself. There are two separate droid societies in the Unknown Regions, the Silentium and the Abominor. Both are originally extra-galactic in origin, and it is implied - though never explicitly stated - that they are from the Yuuzhan Vong home galaxy. It was probably the Abominor who invaded Yuuzhan'tar, provoking the Yuuzhan Vong counterattack that led to the eventual Yuuzhan Vong war in the Star Wars galaxy.
Not really. There are droids that achieved sapience and became threats, such as IG-88, but no singularity as such.
No. The largest droids ever created were the aforementioned Silentium, and larger constructs, such as the Death Stars, weren't entirely AI-based.
No. To my knowledge, there has never been an artificial animal intelligence in a Star Wars production of any kind.