A couple of evenings ago, I called CQ on 50.150 on the drive home and was called by Nick, G1URJ at Wallingford. Had a nice chat with him and he mentioned an interest of his was SSTV. I said, 'Ah, you'll know my friend Bob, G0ADH who does SSTV too...'.
Nick said that indeed he did, but that his own interest was in Digital SSTV. I had to confess that I hadn't come across Digital SSTV as opposed to Analog SSTV transmitted by MM-SSTV and the like.
Nick mentioned EasyPal written by Erik, VK4AES - and having gone through some of the websites devoted to it, the pictures are quite spectacular, with error free pictures being shown. Have a look at some examples on G0HWC's website - impresive pictures.
Easypal is free to download and use. Nick mentioned 3.733 is a good place to start listening - with 14.233 the 20m frequency. You only need a regular digimodes interface, so it should be quite easy to get going.
I've never got hugely into SSTV, but it's a fun thing to try and really great for demonstrations. Easypal is certainly on my list of things to try out.