We need to be careful that we don;t give those incarcerated in prison the right to access software so they can go in to harass victims or arrange for that out side of prisons.
We have the right to contac tpeople e.g friends / family but people also have the right NOT to be contacted.
Of course using free software in prisons as part of education programmes, access to services, support etc then YES I am all for that.
But as prisons are usually publicly funded that may come under the Public Money, Public Code campaign.