I like
Tiny House Talk. They've got a pretty good newsletter, and I enjoy seeing all of the tiny house creations people have made. I also like the organization of their website and how they have posts in different categories, such as
Tiny (just tiny houses),
Small (smaller tiny houses),
Micro (which gets into trailers, sometimes boats, and sometimes cars/vans), and
Buses (bus to house conversions, which I find pretty awesome!). My favorite sections on their website are the Micro and Buses, because that just seems awesome to me how small and multifunctional tiny houses can get on these more extreme ends!