This program is basically a utility created to edit your D64 files. Hopefully when it is done it will have all of the features you’d expect from a c64 based disk editor, as well as additional features that make it easier to manage your D64 files.

Here some features:

• Read D64 files, display the directory, move files around the directory, rename files.
• Export files from the D64 into PRG files.
• Import files into the D64 with autodetection for P00 files.
• View/Edit the BAM.
• View the block chain of files on the D64.
• Create new blank D64 files, clean existing D64′s.
• View and modify blocks on the disk in hex.
• Automatic check for crosslinked files on the D64.
• View the directory using the native c64 font.
• SEQ File Viewer using the c64 font with PETASCII->ASCII conversion option.
• Drag and Drop functionality. Drag D64′s onto the main screen to load them, drag other files to import them.
• Preliminary support for importing T64′s.
• A filename builder to enable easy use of the C64 Characterset in filenames.

Changelog:

• Added user option to pick a custom interleave instead of the default of 10.  Use the Configuration Menu to change it.
• Added user option to pick a custom starting track/sector for importing files.  Previous program default was to start at 17/0.
• Changed File Export code to put the exported filename in all lower case.

source: d64editor.com