
Strays of The City
Trap, Neuter, and Release
TNR or Trap, Neuter, and Release is a method that many organizations use in order to keep the population of stray cats in control. It's a very difficult process at times because the cats can be quite troublesome and get out of the traps. The organizations below offer many resources aside from TNR like adopting, fostering, etc.

Bronx Tails Cat Rescue
This non-profit organization is made up of volunteers who focus on improving the lives of stray and feral cats in the Bronx and Harlem.
They use TNR to control the population of cat colonies which allows the prevention of spreading disease. They also provide medical care for strays and ferals and take in friendly cats to put up for adoption.
If readers are interested on getting TNR certification, they provide links and plenty of useful information to inform yurself as well as your community.
Their website also allows readers to donate or buy items from their Amazon wishlist so they may be able to feed strays and take care of fosters.
On their Adopt page, they allow readers to submit an application to adopt one of their fosters.
Make sure to check them out at: http://bronxtails.org/

Neighborhood Cats
This organization learns from the strays they help and uses that information in order to understand what works best when helping them. Their method of TNR is mass trapping which allows them to help entire colonies at once. They've created media in order to help people understand what TNR is, how to mass-trap, and how community members can get certified.
They offer information on taking care of colonies, for example, how to stop water from freezing, how to make a feral cat shelter, how to properly feed the ferals, etc.
If your neighborhood has a colony, you're able to register it onto their colony database where you're able to learn how colonies change over time and it might even help secure funding for TNR.
Make sure to check them out at: https://www.neighborhoodcats.org/