I see on HN that John Bradley, the creator of xv, has died:

https://news.ycombinator.com/item?id=47534086

The real announcements, alas, come from sources that I am unwilling to link to.

Xv, an image viewer/editor, is one of those tools that hit a peak of usability that really hasn't been matched since. It supports a wide range of image-manipulation functions, and has an interface that gets the job done quickly. I've sort of moved away from it over the years, but I still keep it around.

RIP, John, you made something good.
John Bradley, author of xv, has died | Hacker News

@corbet That's a blast from the past. I used xv around 1990 or 1991 on SunOS and later Solaris. I really liked its custom widgets.