I currently use GitKrakens Glo Boards to manage/maintain my notes and tasks but am always keeping my eye out for something a bit more customizable, as the typical "Trello" style horizontal only layout really waste a lot of space. I like that this takes a fluid approach and always fills whatever space is available.
So far I like what I am seeing, though, I have only used it for a few moments. Already, something I think it could really benefit from would be to remain a running background app that resides on the taskbar that you can show/hide with a hotkey.
Often when working on projects I will have multiple IDE's and other software open on 3 monitors and it can become a mess. Often if I have an idea or think of a new feature I want to add randomly, I have to write it down right away or I can forget all about it in a matter of seconds if something else gets my attention before I write it down. To be able to quickly hit a hotkey that brings up the app, I can add it to an 'ideas' collection to later revisit more thoroughly, then hit a hotkey again to hide the app.
I will definitely be spending some more time trying things out, though.
Lastly, based on the images, it looks like there should be at least 13 themes? I only seem to have 5 that came with it. I like the base of the darker themes, but there just isn't enough contrast to them, so it sort of makes everything feel blended together. I will try to see if I can do some customization to them, though.
Most tools I try just are not worth taking the time to offer suggestions about, as the devs get tired of them and move on to other things. This tool has a lot of potential to be extremely popular, I feel, so I definitely hope you take suggestions to heart. Keep up the great work.
Thanks!
-MH