Lower Sorbian dictionary от Derbnik

Lower Sorbian is a language spoken by a Slavic minority in Lusatia in Germany. This dictionary brings fully-functional Lower Sorbian spellchecking to Firefox, including inflected forms of nouns, verbs and adjectives as well as the new ortography (with 'ó' sign).

The same dictionary can be used in OpenOffice: http://extensions.services.openoffice.org/project/HunSpellDic_dsb_DE
or other programs: http://dsb-spell.sf.net/