Read, write and validate CALPHAD thermodynamic databases (Thermo-Calc .TDB and ChemSage/FactSage .DAT)
Detect ISP DNS poisoning and work around it with DNS-over-HTTPS and SNI-preserving connections.
Check the machine-checkable subset of PDF/UA-1 and WCAG 2.1 for PDFs in Python, built on pikepdf with no JVM
RFC 5322 conformant email address parser — dependency-free, spec-tested, with full obsolete-grammar support
Anthropic, PBC
Visionary sponsor
Bloomberg
Visionary sponsor
Hudson River Trading
Visionary sponsor
Meta
Visionary sponsor
NVIDIA
Visionary sponsor
Microsoft
Sustainability sponsor
Depot
Continuous Integration
AWS
Cloud computing and Security Sponsor
Datadog
Monitoring
Fastly
CDN
Google
Download Analytics
Sentry
Error logging
StatusPage
Status page