incubaid/arakoon

A consistent distributed key-value store

bgamari/b-tree

Haskell on-disk B* tree implementation

google/btree

BTree provides a simple, ordered, in-memory data structure for Go programs.

indexmap-rs/ordermap

A hash table with strong order and fast iteration; access items by key or sequence index

SirensOfTitan/indexer

A org mode note vector search indexer.

iwiwi/pruned-landmark-labeling

Fast and exact shortest-path distance querying index

agl/critbit

Critbit trees in C