- tools for iterating using an iterator closure. Provides function similar to python's itertools and macros and iterate directives to iterate over such iterators easily.
- library for building data structures. It is a generalization of the collecting macro, where you can efficiently build other kinds of data structures.
- library for accessing, setting, and deleting values by some key. similar to access
The library comes with implementations for lisps built in data structures (list, array, hash-table, etc.) but can also be extended to other data structures such as those in cl-containers or lisp-interface-library.