FLANN stands for Fast Library for Approximate Nearest Neighbors. It is an open source library under the permissive 2-clause BSD license. The official internet home of FLANN is http://www.cs.ubc.ca/research/flann/. The following is a quote from the website:
"FLANN is a library for performing fast approximate nearest neighbor searches in high-dimensional spaces. It contains a collection of algorithms we found to work best for the nearest neighbor search and a system for automatically choosing the best algorithm and optimum parameters depending on the dataset.
FLANN is written in C++ and contains bindings for the following languages: C, MATLAB, and Python."
In other words, FLANN has a big toolbox, it knows how to ...
