The Canterbury Tales Project: this fifteen years old project has pioneered the application of computer methods to the analysis and publication of texts. It particularly emphazises the use of phylogenetic software for the study of large manuscript traditions.
Casa Fernando Pessoa - Digital Library:
this online archive of Pessoa's personal library contains images of the many printed pages that contain the poet's annotations, commentaries, translations and several other prose and verse texts, as well as drawings, horoscopes and calligraphic exercises.
The Women Writers Project: This Brown University project aims to make available texts by women writers in order to facilitate research and study. The also maintain a specialized subset called Renaissance Women Online.