I use Python because it's easily typed and it seems like it's applicable anywhere. At Absolum, it's usually the first place we begin when trying to automate anything. Debugging and rolling out is so easy it should be illegal. For our colleagues who teach, it's also one of the first languages we start with just because it's so easy to learn/type and you can set up small projects really fast which encourages the students to keep going at it and keep going further.
We use G Suite because of its cheap costs, easy management/administration, Excellent DKIM score, and everything that comes with it. We switched from Microsoft Office 365 because it doesn't work on Linux which is our OS of choice. Furthermore, G Suite does not lack any of the features that Office365 had to offer, I'd even say it offers more.
We use DigitalOcean for our small to medium-sized projects. The nice thing about it is that the initial setup is so easy and fast that we can do in real time with our clients. This solidifies the bond with the clients because for maybe the first and only time they understand and see what's happening. We think DigitalOcean has set a new standard for cloud platforms in terms of price, design and workflow.
I use Apache HTTP Server because it's the first http server I learned to use. Besides that being the main reason I use it, it's still the most used http server for a reason and that's because it works. I've never experienced any issues with Apache that weren't caused by any error besides my own. The only problem I have with it is the tedious setup for virthualhosts but, at Absolum this was our first open-source project to solve with Apache-VHC.
We use VirtualBox to test and create virtual environments, be it a Docker setup, a Kubernetes cluster, a Virtual network or just a normal vm. VirtualBox is the best solution for us because it's free and it works the same as it's competitors.
We use Mollie with their Plink service to create easy, cheap and secure online payment links. For our clients we use their API to automate billing within their custom build platforms or services they already use to speed up their workflow and remove administrative tasks.
We use Neovim because it is the most productive and fastest text-editor/IDE available. We chose Neovim over Vim because of the community behind it. We prefer the vision of Neovim of that of Vim. To stay productive across multiple machines on any OS Neovim is the only solution that we see fit.
We use Centos for our enterprise level clients, where the focus lies in security. Centos is in our opinion the only free option for our enterprise level clients, furthermore the community that backs it offer top-notch guidelines and support to ensure all data stays secure.
We use React Native to create cross-platform apps. Mostly because we believe it's the most stable on out there at the moment and it's the one we chose to learn. We're very interested in Flutter and we hope these platforms keep competing to improve their workflows.