Just pushed out an asynchronous (cooperative, it requires the child process to touch a file to let the spinner know when to stop) Unicode and colorized progress spinner: https://github.com/swelljoe/spinner

I wouldn't call this one production ready yet. It needs to be in a function and needs to get its variables scoped and such. But, I was curious to see if a POSIX shell script could be coaxed into doing those super fun spinner designs with goofy shit like happy faces or peace signs or the like. And, it turns out you can. Long code points don't work, anywhere that I tried, yet...so my dream of a clock face with a moving hand is not yet possible. But, some day, it'll happen.