Now THIS is a case for crowdsourcing (and crowdpersuading if that is a word).
The most useful, versatile and FREE WordPress theme I have ever used has been discontinued from 22 June 2016, Suffusion not available any more . It will not be updated and is no longer available in the WordPress directory. You can see it here at Librarians Matter and how it is being used at the Grove Library .
I just discovered this because I am moving one of my WordPress MU installations and needed to install the theme on my new server. Nope. Not there. Luckily I had a copy of the theme in every single other blog I have ever created, so I could upload one to the new site.
In the post about it, Sayontan, who has been maintaining and updating this for love and service, rather than money, explained that there were unfounded concerns about security of the plugin and that to make it comply would require a complete re-write, which he does not have time nor inclination to do.
This really is a situation where either the thousands and thousands of people who use Suffusion should persuade Sayontan to quit his day job and maintain the theme (heck, I would pay $50 or more a year to support a project like this)… or for a community to form around the plugin, do the rewrite and continue to maintain the update.