Spock/Appendices/Apocrypha

Barbara Hambly's novel gives Spock's unpronounceable full name as "S'chn T'gai Spock," with "S'chn T'gai" apparently being the family name as opposed to the personal name. The ebook Seasons of Light and Darkness also uses this name.
According to Diane Duane's novel Spock's World, Spock was a descendant of Surak.
The novelization of states that during the exile of the Enterprise command crew on Vulcan, Spock and McCoy underwent a series of mind melds facilitated by T'Lar to ensure that any lingering parts of the other's personalities were transferred back to the right person. In the days following Kirk and the Enterprise command crew saving Earth from the destructive effects of the whale probe, McCoy went to see Spock, who was temporarily staying at the Vulcan embassy on Earth and expressed worry that any punishment handed down by the Federation might not let him participate in future mind melds if needed. Spock assured McCoy that the fal-tor-pan was complete, and no further mind melds were needed. Spock told McCoy the two would always retain a smart part of each other in their minds. 
Spock briefly reactivated his Starfleet commission, with the rank of admiral, during the Dominion War, according to Spectre, a on whose writing William Shatner collaborated with Judith and Garfield Reeves-Stevens.
In the novel , Spock and several unificationists were captured by the Romulan Empire. He was ultimately rescued by Montgomery Scott, Commander Riker, Data, and Geordi La Forge aboard the that Scott stole from a Starfleet museum using the shuttle he was given by Picard to control the Yorktowns computer. After believing Scott dead for 75 years, Spock was momentarily startled to see him behind the transporter controls, but quickly regained his control. Scott promised to explain how he reached the 24th century later to Spock.
In the novel The Fire and the Rose, Spock began to lose his emotional control after hearing of the death of Captain Kirk, and eventually returns to Gol to take Kolinahr training again. Spock ultimately succeeded and became truly emotionless, a situation that neither Sarek nor Amanda agreed he should have tried to do. Amanda in particular, felt Spock had rejected his Humanity and therefore in some measure, her by extension. Spock's lack of emotion also ultimately alienated McCoy when he came to ask Spock to stand with him at his wedding to Tonia Barrows and Spock refused. Ultimately, after Amanda's death in a shuttle accident and Spock seeing Sarek grieve for Amanda (which surprised Spock as he mistakenly believed Sarek to have also been a student of Kolinahr), and when Spock realized that he can't grieve for Amanda and that he didn't even miss her, he sought McCoy out on Earth to help him engage in an ancient Vulcan ritual to reverse the Kolinahr, allowing Spock to feel emotions again. This accomplished, Spock rebuilt his relationship with McCoy, was able to grieve for his mother and Captain Kirk, and once again found the balance and peace between his Vulcan and Human halves, allowing him to have emotional control again without rejecting his emotions.
In the novel Provenance of Shadows, Spock, having been contacted by McCoy's wife Tonia Barrows, and told that McCoy was taking a turn for the worse, went to see McCoy because he had regretted that he didn't get to see either Kirk or his mother once more before their deaths, and he was not going to make that mistake this time. Spock did spend the day with McCoy and planned to return the next day, but as he left McCoy's house, Spock was left with the impression he would never see McCoy alive again. Spock's feelings are proved correct as McCoy does die peacefully in his chair on the porch that same evening before Spock can return, with Tonia by his side, reflecting on his life and the good work he's done and his family and friends.
In the novel , Spock commanded the science ship Intrepid II in 2294, a year after Kirk was lost in the Nexus. Within the story, Uhura was Spock's first officer and McCoy his chief medical officer.
Other novels set after Star Trek VI established that Picard was at the wedding of Spock and Saavik met Sarek.
In the novel Yesterday's Son, Spock found out that he had a son with Zarabeth, whom she had named Zar.
In the game Star Trek: Armada, Ambassador Spock was sent aboard a Galaxy-class starship to mediate a treaty between the Klingon and Romulan empires on Romulus. The Borg intercepted this ship and assimilated him. The traveled two days back in time to make sure he reached the peace conference. The plan succeeded, resulting in Romulan and Klingon ships being dispatched to assist the Federation in defending Earth.
In the comic series Star Trek: Countdown, leading up to , Spock was aided in his attempts to help convince the Vulcans to provide the Romulans with the red matter necessary to stop the impending supernova explosion by Jean-Luc Picard, who was now Federation Ambassador to Vulcan, as well as by a restored Data, who was now captain of the Enterprise-E. Also, the comic established that Geordi La Forge had designed the Jellyfish, which Spock used to drop the red matter into the supernova. Just after the Jellyfish and the Narada were pulled through the black hole and into the alternate reality, the black hole finished collapsing and the Enterprise arrived in the area finding no indication anywhere that Spock managed to escape. Presuming Spock to be dead, Picard said that he hoped his friend's soul did indeed live long and prosper.
In the of , after Kirk told Spock that , , , and – all but one of the group of officers who had once been willing to throw away their careers to save him – were all serving on the (taking McCoy's presence for granted when following the confirmation of the other three), Spock suggested to Kirk that their meeting, and the way the crew was already coming together, was the work of the timeline attempting to "fix" itself. As for the one person not yet aboard the ship, he had been well aware that Scotty was stationed at the outpost, which he had visited on occasion for supplies – though it wasn't clear whether they had actually met – but he had a made a point of keeping his distance. This self-imposed isolation was the only reason that he happened to be at the right place with a torch as the hengrauggi wrapped its tongue around Kirk's leg, which struck him as yet more evidence to support his theory – Kirk's arrival made it clear that the three had converged there for a reason, since he could give Scott the basics of his own invention, and therefore return Kirk to the Enterprise, with a way to take his rightful place in command (seeing that the young officer was obviously unaware of Regulation 619, he admitted to having forgotten how insignificant such things had been to the Kirk he knew so well), and hopefully be able to minimize the damage to the timeline.
In the comic series Star Trek: Spock: Reflections, the events leading up to Countdown were detailed. He traveled to Veridian III after Picard sent him a message following the events of explaining what really happened to Kirk regarding his "death" on the to retrieve his body where he brought him back home to Earth to be reburied at the Kirk family farm in Iowa. Spock explained to Picard how Kirk did the same for him, at a terrible cost and that he needed to be equal to Kirk's sacrifice. Picard then tells Spock that he would be welcomed to return to Starfleet duty, in any capacity, but Spock planned to return to Romulus to continue his work. Picard asks whether arrangements can be made to make Spock's presence there official, but Spock declined, saying he has always led "a life of solitude and duty". As Spock remembers how he once worked with remarkable friends and comrades, he tells Picard to treasure those times in his own life, since they will someday end. They exchange the Vulcan salute and Picard walks away, but turned back to see Spock still standing quietly by his friend's grave.
Leonard Nimoy and Zachary Quinto also lent their voices to Star Trek Online; Nimoy reprised his role as Spock and narrated key events to players, while Quinto voices a Mark VI Emergency Medical Holographic program who helps the player though the tutorial level.
The virtual collectible card battle game Star Trek: Rivals was using Nimoy's picture for card #103 "Ambassador Spock".
The Star Trek: Ongoing story arc Legacy of Spock focuses on his place in the alternate reality's new Vulcan settlement. Though initially blamed in part for the ultimate destruction of Vulcan, he is ultimately revered for his dedication to his people and receives a monument that is still standing 3,000 years later. Unlike the other monuments, which are massive, his is life-size, reportedly because he felt to make it any larger would not be "logical".
In the third issue of the Doctor Who crossover comic Assimilation², Kirk, Spock, McCoy, and Scott investigate a Federation archaeological team on the planet Aprilia III on stardate 3368.5, which had lost contact with Starfleet. Upon landing in the shuttlecraft Galileo, they are greeted by project manager Jefferson Whitmore, who assures them that all is well and gives them a tour of the facility, but Kirk finds the staff suspiciously calm, which Spock agrees with as by Human standards, the research team seemed remarkably placid and unemotional. The team later return to the facility after dark where they meet the Fourth Doctor, assuming he's a member of the research team and he helps them break the electronic lock with his sonic screwdriver and then offers Spock a jelly baby. Together, they infiltrated the facility. There, they find the researchers standing catatonically, with small cybernetic devices in their ears. It is discovered they were under the control of the Doctor's enemies, the Cybermen. A battle ensues and Spock and Scotty use their phasers on two Cybermen, while Kirk and the Doctor handle the Cyber-Controller. The Doctor then uses gold dust to clog up the Controller's respiration, allowing Spock to fire his phaser and destroying it. After the Cybermen are defeated and the Doctor slips quietly away, Spock assures Kirk there are no signs of anymore Cybermen on the planet, but Kirk arranges for a permanent garrison of Starfleet Security personnel to protect the researchers just in case.
In Star Trek Cats, Spock is depicted as an Oriental Shorthair cat.
In the novel The Last Best Hope, Spock left Romulus in the early 2380s, believing there was nothing more he could achieve in the face of the predicted Supernova, but not without taking as many survivors as his small ship can carry with him. He was later contacted by now-Admiral Jean-Luc Picard when his journey brought him to an unplanned rendezvous with the USS Verity.
Spock appears in the video game Star Trek: Resurgence, where he comes aboard the USS Resolute to assist in stopping a crisis between the Hotari and the Alydians.