Handy multi-purpose collection classes.

All collections are in the System.Collections.Generic namespace.

Collection dictionaries:

• ListDictionary<TKey, TValue>: A dictionary of lists, similar to Dictionary<TKey, List<TValue>>.
• SetDictionary<TKey, TValue>: A dictionary of sets, similar to Dictionary<TKey, HashSet<TValue>>.
• StackDictionary<TKey, TValue>: A dictionary of stacks, similar to Dictionary<TKey, Stack<TValue>>.
• QueueDictionary<TKey, TValue>: A dictionary of queues, similar to Dictionary<TKey, Queue<TValue>>.
• DictionaryDictionary<TFirstKey, TSecondKey, TValue>: A dictionary of dictionaries, similar to Dictionary<TFirstKey, Dictionary<TSecondKey, TValue>>.

Other collections:

• UniqueDrawer<T>: A collection of Ts that can be drawn (removed and returned) in a specified and/or random order until the drawer is empty.
• BidirectionalDictionary<TKey, TValue>: Mostly a Dictionary<TKey, TValue> that is extended to provide performant methods with TValue inputs.
• SerializableDictionary<TKey, TValue>: A dictionary that can be serialized, similar to Dictionary<TKey, TValue>.

In Unity: Window > Package Manager > + > Add package from git URL, then enter:

https://github.com/tea-spoons/collections.git

Pin a release by appending a tag, for example #v0.10.0.

See CHANGE-PLAN.md for what changed before publishing and what is planned next.

Copyright (c) 2026 Bigpoint. Authored by Muhammad Tarek Abdou.

Available for research, education and other noncommercial use under the PolyForm Noncommercial 1.0.0 license. Commercial use is not permitted.