Regarding Dasher, David mentioned recently* that he hopes someone carries on supporting the work. It's a brilliant example of arithmetic coding in action and helps many people communicate through low bandwidth channels. Now that he's gone, I don't think any has any ownership over the project. It'll be a huge shame for it to be forgotten about. If anyone's interested in helping in someway, mention it here and I'm sure we can figure something out. Here's a quick example of it an action (https://youtu.be/ie9Se7FneXE?t=28m38s - Google Talk from 2007)

[*] David was still teaching us information theory just last month, despite going through chemo which by his admission seemed to take a lot out of him. By everyone's account he was astounding lecturer. He really cared that no one fell behind. Very sad about the news today.