To download a free D'Nealian font, go to FontSpace.com and type Dnealian in the search field. Then, browse the search results, right-click on the D'Nealian font and choose the Download option.
The Download button is located in the lower left portion of the search result listings. Once the download is complete, right-click on the zip-file and select the "Extract To" option. Extract the file and install the font to your computer.
As of 2015, FontSpace.com offers multiple freeware versions of the D'Nealian font typeface. Some fonts are downloadable solely for personal and non-commercial use. FontSpace fonts only work with Windows 7, Vista, XP, Mac OSX and Linux operating systems.