Coptic: The Coptic Church's site for resources including daily readings, online dictionary, and font downloads for the study and use of Coptic.
Coptic Fonts: For Windows and DOS.
Coptic Language: Wikipedia article.
Lance's Coptic Language Resources: Provides downloads of a number of PDF files on Coptic grammar (Sahidic and Bohairic) and lexicon, as well as a lengthy Coptic text with translation and notes.
So you want to learn coptic: Bohairic Grammar: Grammar aimed at non-linguists wishing to learn Bohairic Coptic through self study.
The Coptic Language: History of the language, justification for studying it, alphabet, and language lessons.