The Best NIST Digital Library of Mathematical Functions Alternatives in 2026

NIST’s Handbook of Basic Atomic Spectroscopic Data provides reference data maintained by its Physical Measurement Laboratory.

The INFRA-ART Spectral Library supports heritage science and conservation with searchable reference material and sample spectra.

China’s national reference materials platform shares reference material resources and information on measurement and testing programs.

Search BioModels for freely available mathematical models of biological and biomedical systems.

NIST’s Atomic Spectral Line Broadening Bibliographic Database provides references about atomic spectral line broadening, from 1889 onward.

Foto Marburg welcomes visitors to its art history documentation center and image archive, with links to image search and its image index.

BALSA hosts analyzed neuroimaging datasets and indexes studies for researchers.

The German ZVDD portal indexes digitized printed works dating from the 15th century onward, with title search and collection browsing.

RCSB PDB supports searching, visualizing, downloading, and analyzing protein structures and related sequence, structure, and function data.

The National Microbiome Data Collaborative is merging its core functions into DOE-BRIDGE as its program concludes.

The Gene Ontology project represents knowledge about gene functions across molecular, cellular, and tissue system levels.

Search authenticated microbial reference genomes in the ATCC Genome Portal.

The NEA Thermochemical Database project develops reference thermodynamic values for compounds relevant to radioactive waste safety and geochemical modeling.

Italy’s National Oceanographic Data Centre is the national reference for the UNESCO oceanographic data exchange system.

The EUREF Permanent GNSS Network provides access to the European Terrestrial Reference System 89 through a network of continuously operating reference stations.

IERS provides data on Earth rotation, reference systems, and geophysical fluids, with models, standards, and current bulletins.

DEG provides a browser for archaea essential genes, with organism, condition, and reference records.

CARS shares data from the first release of the Close AGN Reference Survey, a spatial survey of active galaxies.

CDMS provides reference data for molecular spectroscopy, with database records and guidance on their content and citation.

The Earth Orientation Center provides Earth orientation time series, reference series, bulletins, and related analysis resources.

Browse the Lunar Orbiter Photographic Atlas, a reference collection documenting photographic coverage of the Moon.

AUB ScholarWorks collects, preserves, and distributes digital materials through American University of Beirut repositories.

The Lund University Humanities Lab Archive provides a searchable digital repository for the lab’s research materials.

Ktisis is Cyprus University of Technology's research information system for digital materials related to university activities and research.