Big fan of the IODD. I love having a ton of bootable images ready to go on a single drive. I mostly use it to boot disk wiping software, disk imaging software, and malware removal tools but it also serves as my main flash drive with common software and scripts I use a lot.

My company has been moving onto Kubernetes recently and I've found Lens to be very helpful with it. It has a nice cluster dashboard and has inbuilt shortcuts to jump onto containers, see logs, etc.

I’m a big fan of RoyalTS for managing my RDP / SSH access to servers. Keepass for password storage.

Notepad++ is one of the best applications ever made

Powershell scripts have been my tool of choice for the past few years (stuck in Windows world unfortunately).

Lately I've been dipping my toes into automating switch config - Ansible has been fantastic for that.