Skachatok If you need a free mapping sidekick, QGIS is the gold standard for open‑source GIS – it’ll let you plot every supply route on top of real map tiles from OpenStreetMap or Google. For inventory, the community edition of Odoo is a solid choice; it tracks stock, sales and purchases, and it can be hooked up to your QGIS data via a custom script or an Odoo‑GIS module. If you want something lighter, Airtable’s free plan works great for a spreadsheet‑like inventory tracker, and you can link those records to a Google My Maps route plan to keep everything in sync. All of these tools stay free for small‑to‑medium use, and they’re flexible enough to grow when you do.