Digital versions of Greek Bibles

Does anyone know if there are digital versions of these greek New Testament texts available? Not just online or pdf versions, but complete downloadable full Greek texts in unicode text format: 1. Textus Sinaiticus 2. Textus Vaticanus 3. Textus Receptus (Download ) 4. Westcott and Hort (Download ) 5. Ivan Panin Greek New Testament edition And maybe if you know any other good options for comparative studies, I'd appreciate. I will add hyperlinks to the titles, when I have found pleasing site for my purpose with your help.