What tools have you written that had a great impact on productivity

Question

The was a long discussion here[0] about the pros and cons of sharing tools/scripts to increase productivity but there weren't a lot of people describing what they've created. I thought it would also be a good discussion.What have you created for your self or your team that helped boost productivity by an outsized amount?[0] https://news.ycombinator.com/item?id=29486243

billconan · Accepted Answer

I developed a node editor that generates state machines in rust to simplify/prune abstract syntax trees.It greatly improved my productivity. I can't imagine creating a complex state machine in a non-visual way. Code (functions in a source code file) is organized linearly, whereas a state machine is a graph.

ssss11 · Answer

When in retail IT I created a script that improved the daily polling processes from hundreds of retail stores to the central system. All I did was make it more resilient to error conditions, and re-poll any error’d stores once.
Before: I’d start work and manually fix ~30% of sites which didn’t poll properly
After: I’d fix the one or two, usually their link had been down for a while or was still down and I couldn’t get the data anyway. it saved around 60-90 min a day