[thruflo]

We do an open source one you can make yourself https://www.opendesk.cc/lean/standing-desk

[anotherevan]

Still wanting to see a design for a height adjustable sit/standing desk.

https://news.ycombinator.com/item?id=6234588

[thruflo]

The standing desk is sit / stand height adjustable.

It is quite heavy, realistically taking two people to adjust, so you wouldn't normally adjust it too often but it has three heights: standing, bar and sitting, as outlined in the description.