For me, it's the local Freecycle community in my city. Also, an area UU church still uses Yahoo Groups for several mailing lists. Trying to help them technical

For me, it's the local Freecycle community in my city. Also, an area UU church still uses Yahoo Groups for several mailing lists. Trying to help them technically 10 years ago was difficult at the least; I gave up and eventually moved on. It took a few deaths in the congregation for them to update their website, for example. And now, the virtual death of Yahoo Groups will force them to change again.