William Gallagher, knight errant raconteur of rare wit, has a 1000 subscriber celebration on his Youtube channel. There will be a contest of some sort, and two lucky participants will get copies of OmniOutliner.

I doubt Gallagher has any stake in OO, nor do I. Just mentioning this for two reasons.

Although I have some quibbles with details in the OO works (column height if a hidden column word-wraps, for example), it's a very useful tool.

Also, Gallagher's Youtube channel is highly entertaining and informative.

Here's the link to that giveaway - https://youtu.be/ptriuS57NfQ

I’m finding the rapidly evolving Zavala a pleasant alternative to other desktop outliners.

It doesn’t have OmniOutliner’s columns, but the developer is very committed!

I run it on macOS (from GitHub) and on iOS (via Testflight).