Non-Metric Space Library (NMSLIB): An efficient similarity search library and a toolkit for evaluation of k-NN methods for generic non-metric spaces.

Nearest Neighbor Search with Neighborhood Graph and Tree for High-dimensional Data

Embeddable, in-memory, document-oriented database with a high-level Query builder interface.

Multi-Modal Database replacing MongoDB, Neo4J, and Elastic with 1 faster ACID solution, with NetworkX and Pandas interfaces, and bindings for C 99, C++ 17, Python 3, Java, GoLang 🗄️

Fast and lightweight header-only C++ library (with Python bindings) for approximate nearest neighbor search

Code for ECCV2018 paper: Revisiting the Inverted Indices for Billion-Scale Approximate Nearest Neighbors

Performance-portable geometric search library

A header-only C++ library for k nearest neighbor search with Eigen3.

a super lightweight head-only 3d kdtree library based on nanoflann

KD tree implementation with kNN and sequential scan search

Simple tests for MRPT algorithm

A hybrid search system combining B+ Trees for range filtering and HNSW for approximate nearest neighbor (ANN) search. Features bulkloading for efficient tree construction, HNSWLib integration, and dynamic switching between brute-force and ANN search for optimal performance. Supports binary data processing and visualization with Graphviz.

Cuda implementation of k-nearest neighbor search

amableDB - Get Fast Similar Float-Vectors