Nope, but I hear they are not cheap.
Before NAMM, Wes Hauch from The Faceless sent his VGS guitar up here for some EMTY Blackouts to be installed. The guitar had the Evertune and it was freaky! Straight of the box it was perfectly in tune and it was set so that even when you bent the string it stayed in pitch. We were yanking on the strings and couldn't get it to change and there were no locking tuners or anything like that.
While it's a great concept, If i understood correctly, you can't drastically change tunings on the fly. That would be a deal breaker for me.
That thing just needs a "d-tuna" system to drop the E string in one move and it would be the perfect bridge
I locked that link into my favorites. I was definitely going with a Schaller Hannes bridge on my next build, but now I have to reconsider.
Otherwise you can grab the strings and bounce it up and down like a yoyo and it won't go out of tune. It's invasive and expensive, but there's nothing else like it.
Nothing else like it? Uhm... good ol' Ibanez LOPRO* EDGE, anyone?? I've tossed the guitar around holding it UP IN THE AIR BY WHAMMY BAR ALONE, and not just once neither, over a period of several MONTHS - and I've yet to open the toplocks. Not once since purchase.
Oh, and on the up side? It can also do tremolo. Lol... and TODAY, and every day since the late 80s or early 90s, not "what if/ maybe someday" like that Evertune Trem. Lol.
* - and, presumably, the original Edge as well. Can't vouch for it, though, never having owned a non-LoPro Edge trem.
PS Also please note that seemingly all the shining reviews of Edge trems generally only salivate over Edge Original & LoPro Edge Original, so Your Mileage WILL Vary if you're staring at a 2000's IndoChinese Ibby trem with the Edge moniker. Moral of the story? Buy old Japanese and don't get caught tearing out yer hair and screaming "WTF?!" later.