See the Colemak Mod-DH Project Home Page for information.
Mod-DH is now supported by DreymaR's Big Bag of Keyboard Tricks.
To enable it, edit the symbols/colemak file and uncomment the DVBG and HM sections as mentioned in this Colemak forum discussion.
There are currently a selection of files for xmodmap. See xmodmap folder for details. You may need to customize these for your own language/region.
There are also files for Microsoft Keyboard Layout Creator (KLC). To use, load them into Keyboard Layout Creator and use the menu option "Project > Build DLL and Setup Package".
UK Mod-DH (full): Download
UK Mod-DH (left): Download
UK Mod-DH (full, wide): Download
UK Mod-DH (left, wide): Download
US Mod-DH (full): Download
US Mod-DH (left): Download
US Mod-DH (full, alt): Download
US Mod-DH (left, alt): Download