Collections
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An experimental foundation library for Scala focussed on efficiency and clean design.
Last Release on Dec 24, 2012
Java Collections which are designed to be huge (may GB)
Last Release on Sep 24, 2014
Commonly used utility classes (java.util.Collections related)
Last Release on Sep 14, 2016
Carefully designed and efficient extension of the Java Collections Framework with primitive specializations and more, built for Java 8 (API)
Last Release on Oct 9, 2015
Collections library of the Staccato-Commons project, focused on providing new abstractions that mix object oriented and functional programming style for dealing with iterable objects.
Last Release on Jan 2, 2012
Persistent (immutable) collection library for Java
Last Release on Apr 10, 2014
Dynamic Collections provides a suite of tools to extend and enhance the Java Collections API.
Last Release on Oct 5, 2013
High performance bit set implementations.
Last Release on Mar 27, 2015
fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists and priority queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O ...
Last Release on Oct 12, 2013

Relocated → it.unimi.dsi » fastutil
Ponzu is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings.
Last Release on Aug 8, 2012