Stored Collection is a data persistence API, which lets you use a collection of Dictionaries.
SC saves you memory, because the collection is stored in a SQLite database on disk. When you access an element the database is read, a Dictionary is created and returned to you, all other elements remain on disk and not in memory.
The primary concern for SC is memory saving but it can also be used as a simple data store.
Stored Collection is on github:
(an example project demonstrating use is included in the repository)