Hoverfly
hoverfly.ioA proxy-based API simulator that records traffic for repeatable tests without calling the real service each time.
A proxy-based API simulator that records traffic for repeatable tests without calling the real service each time.
Use desktop chart studies with explicit exchange-data options
Build event-driven market simulations with a shared strategy engine
GPU fire and smoke simulation with sprite-sheet and volume exports
Write load-test scenarios as code and control the request rate sent to an application.
Retail and custom type, with multilingual engineering and free Overpass fonts.
Liquid simulation with detailed meshing controls and animated geometry exports
Model-based end-to-end test automation for enterprise applications and business workflows.
Learn chart and order workflows with a separate paper-trading mode
Pattern-based 3D garments and cloth simulation
Solana protocol explorer with a free transaction-message simulator
Experience management platform that turns human understanding into decisions.
Environments for training AI and agents that handle recurring engineering work
Engineering formulas, reference data and calculation tools
Geometry and mathematical exploration with constructed figures
Engineering calculations across circuits and mechanics
Measurement conversion across everyday and engineering units
Engineering leadership through recurring essays
Technical data and calculations for engineering study
Civil engineering exam preparation with review courses, practice exams, videos and study resources.
Data infrastructure and engineering reading
Reading about analytics engineering and adjacent data work
Engineering calculations with steps and interactive models