Stretchy bind-offs can be used on toe-up socks, on scarfs that are knit lengthwise so the bind-off is as stretchy as the cast on.
Finish your knits with a stretchy bind off - Gathered
Jeny's Surprisingly Stretchy Bind-Off (JSSBO) Tutorial
How to Work Jeny's Stretchy Bind-off – Cocoknits
How to Work Jeny's Stretchy Bind-off – Cocoknits
Learn to Knit: 3 easy stretchy bind-offs - Ysolda
Learn to Knit: 3 easy stretchy bind-offs - Ysolda
Stretchy Bind Off Comparison – Stitch Diva Studios
How to Work Jeny's Stretchy Bind-off – Cocoknits
Knitting magazine, Stretchy bind off, Crochet
Jeny's Surprisingly Stretchy Bind-Off (JSSBO) Tutorial