SD2IEC Wedge 64 v23.01 by DiscMix - This is a pretty cool DOS wedge for SD2IEC devices that can be loaded into $C000 or $9000 providing many useful commands for working with files, directories and more.

Here is a link to the  authors site (https://sw64.mrys.de/) where the latest version can be downloaded and documentation can be found.  There is also a text file in the archive with documentation.