PubChem
pubchem.ncbi.nlm.nih.govChemical structures, substances and bioassay information
Chemical structures, substances and bioassay information
Detailed bird life histories with maps and multimedia
Open textbooks for higher-education subjects
Curated learning-resource discovery by discipline
Guides for international and foreign legal research
Academic phrasing organized by rhetorical purpose
Anatomy articles, diagrams and three-dimensional learning material
Pathology images and tutorials for medical education
An ophthalmology encyclopedia written by eye specialists
Build browser interfaces with declarative components compiled from HTML, CSS, and JavaScript.
Work with files and command output as structured records and tables in a cross-platform shell.
Learn and test text patterns with live feedback
Develop mobile illustrations with editable brushes and layered drawing
A curated registry of biological and biomedical ontologies
Alberta health references, patient handouts and service information
Controlled terminology for art and cultural-heritage research
Educational tools for examining global facts and assumptions
Shakespeare texts with scholarly and educational context
A multilingual encyclopedia with a language-aware search
Related English words for revising a draft
A versioned taxonomic catalogue of spiders
A historical London map linked to texts and reference records
Math and electrical calculations in a compact tool directory