A one-person software studio
I manage construction materials testing at a geotech firm in Florida — job sites by day, the lab in between. Nights and weekends, I build small tools for the problems I kept hitting in the field. If one saves your crew an afternoon of rework, it's done its job.
Proctor curves, sieve analysis, density acceptance, and LBR. I built it because I kept redoing the same math in the truck, and the lab spreadsheet broke every time someone touched a formula. It runs the numbers, checks them against spec, and shows its work.
Forward an invitation to bid and it reads the deadline out of the email, then reminds you a week out, three days out, and the morning it's due. Every bid platform only shows you the invites it sent. Your inbox has all of them.
These are small tools built by one person, in the hours around a day job. That means they do a few things carefully instead of everything at once, and previews stay closed until they're worth paying for. Something off, or a tool you wish existed? Email me — I read every one.