Does anyone here know anything about "Let's Encrypt" by the Internet Security Research Group (ISRG)?
 
https://letsencrypt.org/
 

They don't seem to be part of the usual gang - FSF, GNU, GPL, Apache, Linux, etc., etc., yet they express similar philosophies.  Who are they?  How credible are they and their effort?  And how does their effort compare to other free security certificates?

 

A colleague of mine tipped me off onto this, and he especially is wondering.