This app was mentioned in 1 comment, with an average of 1.00 upvote
Cyberdeck aid is great. I also use runners initiative Manager, formerly shadowrun combat manager. Makes calculating changes in initiative from actions, interrupts, and more support handy.
More niche and less polished, I've also gotten some mileage out of Spirits SR5, which is a neat little reference for different types of Spirits in shadowrun. I wish it had more functionality (like stats based on force) but add a reference I've used it on a few occasions.