Show HN: I built a map of billboards and banners in Poland (gpy.pl) https://ift.tt/btnuRUJ

Show HN: I built a map of billboards and banners in Poland (gpy.pl) https://gpy.pl/ October 29, 2026 at 01:24AM

Show HN: Measuring how much of an AI-assisted design is yours https://ift.tt/ujM1dqO

Show HN: Measuring how much of an AI-assisted design is yours https://ift.tt/m2tf4Cs October 29, 2026 at 12:11AM

Show HN: OpenTaxRate – open-source US sales tax rates by street address https://ift.tt/LItv3D2

Show HN: OpenTaxRate – open-source US sales tax rates by street address I built this because I tried many sales tax APIs and the problems were: a) the rates were a black box with no source attached b) lookups resolved by ZIP code. ZIP codes are postal routes, not tax jurisdictions. Stripe's Tax team wrote a good post on this [1]: two houses in Drexel, MO share a city, a ZIP, and nearly a house number, but sit in different counties with different rates. If your lookup key is the ZIP, you are wrong on those addresses, even when the rate table is accurate. OpenTaxRate resolves the street address instead: - SST member states (24): the quarterly rate + boundary files, street ranges and ZIP+4, not just the rate tables - Non-SST states: a custom adapter for each state, using its DOR's own published tables and boundary files (TX Comptroller, FL DR-15DSS, ALDOR, IDOR, NY Pub 718, California via CDTFA's lookup, etc) - Census TIGER for geometry I tried with multiple open source geocoders you can self-host: Nominatim, Photon and Pelias, as well as proprietary ones (HERE, Geocodio, Mapbox, Google). Proprietary ones have higher accuracy, ~99.3% correct vs. 97.1% with just open source. For comparison: Avalara AvaTax 99.6%, TaxJar 98.2%. Public benchmark set are in the repo and at opentaxrate.com/benchmarks. Rates are just one part of sales tax, but also there's a ton of work in maintaining it as rules change. It doesn't handle exemptions, holidays, and caps. It returns the rate, plus the state's own location and jurisdiction codes for the address, resolved to the address, with its official source attached. MIT licensed, you can self-host with Postgres + PostGIS. [1]: https://ift.tt/6EkJKlB... https://ift.tt/kAzIRBx October 28, 2026 at 11:10PM

Show HN: Tar-minefield shows where tar implementations disagree https://ift.tt/K6jxS3v

Show HN: Tar-minefield shows where tar implementations disagree https://ift.tt/qeKwZky October 28, 2026 at 12:51AM

Show HN: Jog – GitHub runners for 80% less https://ift.tt/pQUGi7V

Show HN: Jog – GitHub runners for 80% less https://usejog.com/ October 28, 2026 at 12:21AM

Show HN: AgenticBench, 9 security tests run on 25 AI coding agents https://ift.tt/KxFpXJ4

Show HN: AgenticBench, 9 security tests run on 25 AI coding agents https://ift.tt/AUTHWoG October 27, 2026 at 10:38PM

Show HN: Glider 4.0 Unofficial Web Edition (Mac game port) https://ift.tt/CeJdVOP

Show HN: Glider 4.0 Unofficial Web Edition (Mac game port) https://ift.tt/lBAO0i1 https://ift.tt/RuSgqTz... https://dbohdan.github.io/glider/ October 26, 2026 at 04:48AM