Arroyo re-settled using G.E.C.K.

“After the Enclave's destruction, the refugees of Arroyo and Vault 13 resettled, building a new community with the aid of the Garden of Eden Creation Kit. Finding themselves hundreds of miles from their Vault, the members of Vault 13 chose to join the villagers in establishing a new community, and their technical expertise, combined with the villagers survival skills, allowed the new settlement to grow and prosper. Two generations of the same bloodline were re-united, and their savior, the Chosen One, became Elder, presiding over the village in the years to ”
come.”

Fallout: New Vegas establishes this ending as canon

3. Modoc flourishes

“Relations between the Slags and residents of Modoc flourish. Between the two peoples, Modoc prospers and becomes a major farming community, ”
supplying all the outlying regions with food.”

Fallout: New Vegas establishes this ending as canon.

4. VC joins the NCR

"In the years following the destruction of the Enclave, Vault City continued to stagnate, choking on its own isolationism. Its Vault 8 generator, which was never intended to support such a large population, prevented Vault City's necessary expansion. Eventually, the city was absorbed by NCR, which had spread steadily northwards ”
since its founding.”

Fallout: New Vegas establishes this ending as canon.

3. Bishop child

"Not long after the destruction of the Enclave, the Bishop Family of New Reno was blessed with a child. This child seemed to have little in common with the Bishops, preferring instead to spend his days exploring the wastes. When he turned thirteen, he seized control of the Bishop Family and led them to victory over the remaining New ”
Reno families. He died quietly in his sleep at the age of seventy-three, never having known his real father.”

Fallout: New Vegas establishes this ending as canon.

-

7. Mordinos wane

"With their jet production halted with the discovery of a cure, the Mordino Family quickly lost ground in New Reno and were absorbed by the other families. Most became enforcers or slaves, and the name Mordino was soon ”
forgotten.”

Fallout: New Vegas establishes this ending as canon.

-

Wrights transform New Reno into a civilized city

“Within a year of the Enclave's destruction, the Wright Family turned from criminal activity to legitimate pursuits. Several schools and churches were established in New Reno, along with a law enforcement body that crippled the influence of the families. Though New Reno lost much of its edge, the city obtained a certain solidity that appealed to newcomers. Many came to Reno, not to visit, but to live, and the population increased threefold. Today the test scores of New Reno high school graduates are greater than many Californian schools before the ”
War.”

Fallout: New Vegas establishes the continued presence of the Wrights in New Reno as canon.

-

Richard Wright's murder
Murder solved

“Though the Wright Family never completely recovered from Richard's death, the knowledge that the killer had ”
been brought to justice eased their troubled sleep.”

Fallout: New Vegas establishes this ending as canon.

Myron dead and forgotten

“Myron died less than a year after the defeat of the Enclave, stabbed by a jet addict while drinking in the Den. His discovery of jet was quickly ”
forgotten, and now there is no one who remembers his name.”

This ending can be assumed to be canon.

4. Gecko and Vault City form an alliance

"Optimizing Gecko's power plant became the first step in forging a spirit of cooperation between Gecko and Vault City. Gecko's increased power production became instrumental in helping Vault City's expansion. The harsh xenophobia of many of Vault City's leaders faded into obscurity while ghoul and human labored side-by-side to ”
create a center of learning and tolerance where once had stood only enmity and distrust.”

Fallout: New Vegas establishes this ending as canon.

Harold's tree grows larger

"You still hear mention of Harold from time to time. Apparently, the tree growing from his head has gotten larger, and if rumors are to be believed, fruit is growing from it. The seeds are said to be remarkably tough, and several ”
of them have taken root even in the most barren stretches of the wasteland.”

Fallout 3 establishes this ending as canon

Redding joins the NCR

"Several years after buying the Excavator Chip from the Chosen One, Marge LeBarge is able to purchase and control both the Morningstar and the newly opened Kokoweef mines. Marge is an easy choice for Mayor, and using her new political power, she makes Redding join the growing New California Republic in return for a seat ”
in the NCR's Hall of Congress.”

Fallout: New Vegas establishes this ending as canon.

Uranium runs out, Broken Hills peacefully disperses

"With the destruction of the conspiracy to destroy the mutants, Broken Hills began to thrive. Then the uranium ran out. The city, having lost its sole reason for existing, slowly dispersed. The residents carried their riches with them, leaving the place a wind-swept, desolate ghost town. A few hold-outs remained, attempting to eke out a ”
pathetic existence, but eventually, they too, disappeared.”

Fallout: New Vegas establishes this ending as canon.

Marcus travels East

“Inspired by the example set by the Chosen One, Marcus eventually traveled across the great mountains to the east, searching for other ”
refugees from the Master's army. You never heard from him again.”

Fallout: New Vegas establishes this ending as canon.

NCR becomes a major power in the West Coast

"Your help with Vault 15 launched the New California Republic's push to civilize its neighbors. Though there were many more obstacles to ”
overcome, the NCR now had a foothold into the northern wastes.”

Fallout: New Vegas establishes this ending as canon

Vault 15 joins NCR

"With the support you secured from the New California Republic, the Vault 15 squatters soon become self-sufficient and productive members of ”
society.”

Fallout: New Vegas establishes this ending as canon.

It hasn't been confirmed as canon yet but it's very probable they died out, especially since in the Fallout Bible they said that any talking animals in Fallout 2 died out after it ended.

Richardson dead and forgotten

"The destruction of the Enclave erased all trace of President Richardson from history. Now the title of "President" is used simply a bogeyman used ”
to frighten children.”

Fallout 3 and Fallout: New Vegas establish this ending as canon. However, the title of President is still used in the N.C.R.

Super mutants

"The death of the Master was the first major step towards ending his mad dream of conquest and enforced peace, but it is the destruction of the Vats that neutralizes the mutant threat. Without the ability to create more mutants and enforce their harsh brand of justice, the mutant armies flee to ”
the east, beyond the no-man's land.”

The Vault Dweller's memoirs establish this ending as canon

Mutant attack

"The mutant attack on Necropolis spares none of the ghoulish inhabitants. After the mutant armies advance, they ”
leave a truly dead city behind them.”

The Vault Dweller's memoirs and Fallout 2 establish this ending as canon

Gain control of Boneyard

"The Followers of the Apocalypse rise to become a major influence in New ”
California. With your help, they gain control of the LA Boneyard.”

Fallout: New Vegas establishes this ending as canon

New California Republic

"In Shady Sands, Tandi helps her father Aradesh bring a new community and new life out of the broken remains of the world. They are responsible ”
for the New California Republic, whose ideals spread across the land.”

Fallout 2 and Fallout: New Vegas establish this ending as canon

Killian takes control

"Killian Darkwater takes firm control of Junktown, drives out the last of Gizmo's kind, and then enforces his own brand of frontier justice. Life is ”
fair and safe under his law.”

Fallout: New Vegas establishes this ending as canon

Drive mutants away

"The Brotherhood of Steel helps the other human outposts drive the mutant armies away with minimal loss of life, on both sides of the conflict. The advanced technology of the Brotherhood is slowly reintroduced into New California, with little disruption or chaos. The Brotherhood wisely remains out of the power structure, and becomes a major research and ”
development house.”

Fallout 2, Fallout 3, and Fallout: New Vegas establish this ending as canon

Prosperous trade center

"With your assistance, Old Harold brings the ghoul population of the Hub into equality with the humans. The two sides work together, and the Hub ”
prospers. Old Harold is still alive, as far as anyone knows.”

Fallout 2 and Fallout: New Vegas confirm that this ending is canon.

Destroyed as a fighting force

"Thanks to your persistence, the Raiders are destroyed as an effective fighting force, and disband. None of the Raider survivors are ever heard ”
from again.”

Fallout 2 and Fallout: New Vegas establish this ending as canon (although a single Khan survivor, Darion, is found from Vault 15 in Fallout 2, where he is quite influental).