A first responder is seen here carrying what appears to be a child to safety.
According to this Tweet, a first responder got this woman to safety and then went back into the chaos to continue helping.
This Google Doc shows hundreds of Boston area people offering to house and take care of people who were stranded after the blasts.
Many Boston restaurants fed nearby strangers -- even if they couldn't pay for food.
According to the Atlantic, this photo shows a couple reuniting after the blast.
According to this Twitter account, a man used his belt as a tourniquet to help someone injured by the blasts.
Bill Iffrig, a 78-year-old runner, was knocked over by the blast near the finish line. He then picked himself back up and finished the race.
Google set up a 'Person Finder' to help families locate someone who was running or was near the marathon.
Multiple Tweets and reports stated runners in the marathon continued past the finish line to area hospitals to donate blood.
One of the most shared messages on Facebook was this photo and quote from Mr. Rogers.
Deadspin Tweeted this photo of former New England Patriot Joe Andruzzi helping the injured after the blast.
First responders from all over Boston reportedly lined up at a nearby hospital to help the injured.
According to a Tumblr post, this Boston resident was helping strangers by giving them food and a bathroom to use.
This Boston resautant offered drinks, bathrooms and a place to get away from the chaos.
The Brooklyn Academy of Music projected this message to those affected by the bombings in Boston.