fuzzycomplete - https://github.com/Query-farm/fuzzycomplete "This fuzzycomplete extension serves as an alternative to DuckDB's autocomplete extension, with several key differences: ..."

lindel - https://github.com/Query-farm/lindel "This lindel extension adds functions for the linearization and delinearization of numeric arrays in DuckDB. It allows you to order multi-dimensional data using space-filling curves. ... Linearization maps multi-dimensional data into a one-dimensional sequence while preserving locality, enhancing the efficiency of data structures and algorithms for spatial data, such as in databases, GIS, and memory caches."