my husband will be going home with a trach and will likely not have the ability to speak in the future, he has voicebox but no tongue. What software has been most helpful in using for speaking vs just writing all the time?

Caregiver to husband 53 SCC stage 3 soft palate 2011 Rad, recurrence tongue stage 4 2012 induction chemo, partial glossectomy surgery, cancer back left rad neck dissection 2013, more chemo, allergic to erbitux, cancer back 2014 floor of mouth and jaw, mandibulectomy scheduled 3/5/2014