Multiple astronomy data sources
Curated research-sharing platform: physics, mathematics, quantitative finance, and economics
Access the world's Open Access research papers
Global Biodiversity Information Facility
Access millions of museum specimens from organizations around the world
High Energy Physics info. system
Check if a number is even
ISRO Space Crafts Information
Integrated Taxonomic Information System
Spaceflight launches and events database
Curated experimental data for materials science
Asterank.com Information
NASA data, including imagery
NASA Astrophysics Data System
Symbolic and Arithmetic Math Calculator
REST API used to access NoctuaSky features
Number of the day, random number, number facts and anything else you want to do with numbers
Facts pertaining to the physical science of Oceanography
ISS astronauts, current location, etc
Repository and archive for study designs, research materials, data, manuscripts, etc
Real Time Air Quality Monitoring