PediCalc is a clinical-grade Progressive Web App built for the neonatal and pediatric ward at Kabinburi Hospital in Thailand. It calculates Total Parenteral Nutrition (TPN) orders for the tiniest, most fragile patients — a task where a misplaced decimal point can cause real harm.

What makes this repo a hidden gem is the seriousness of the engineering against the smallness of the audience. The author isn't chasing stars; they're solving a workflow problem for nurses and physicians who currently rely on bedside arithmetic and paper sheets. The feature list reads like a checklist of things that actually matter in a NICU:

• Real-time dosing calculations as inputs change — no "submit and pray"
• GIR (Glucose Infusion Rate) validation to prevent hyperglycemia
• Osmolarity checks with peripheral-line risk alerts (a real cause of extravasation injuries in neonates)
• Ca×P solubility product warnings — a classic pediatric TPN trap that has killed infants
• Bilingual (Thai/English) print-ready PDF order sheets that fit the hospital's actual paper workflow

The stack is refreshingly current: React 19, Vite 8, Tailwind CSS v4, packaged as a PWA so it works offline at the bedside on whatever tablet is nearby. The PWA choice is smart — hospital Wi-Fi is notoriously flaky, and a calculator that fails when the network does is worse than no calculator.

Who benefits: Pediatric pharmacists, neonatologists, and nursing staff in low-resource hospitals where commercial TPN software is prohibitively expensive. It's also a great study reference for developers building safety-critical clinical tools — the validation logic alone is worth reading. Medical informatics students could learn a lot about translating clinical guidelines into runtime checks.