your web directory

Mathematics, Nature & Formal Sciences


  1. - scientific article search
  2. BASE | Bielefeld Academic Search Engine
  3. Semantic Scholar: AI-powered research tool for scientific literature
  4. OpenKnowledgeMaps - create a knowledge map on a specific science topic
  5. - find open access books and resources
  6. 34 million citations for biomedical literature from MEDLINE, life science journals, and online books
  7. DOAJ: directory of open access journals and articles
  8. ask authors for article: ResearchGate, shadow services: Sci-Hub, LibGen

Resources, Online Calculators, Misc

  1. Periodic Table: the chemical elements
  2. WolframAlpha: find formulae by text search
  3. Online Calculator - math, finance, chemistry, measure conversion, etc.
  4. Human Cell Atlas, HuBMAP
  5. WALS - World Atlas of Language Structures (WALS)
  6. Greek Alphabet
  7. kiddle/kpedia: science lexicon for kids
  8. ask a question: StackXchg forums
  9. TI Calculators:, some more TI-82 progs

Blogs, Docs & Websites

  1. Deutsch, M. lernen:, matheguru,,
  2., math formulae:
  3. Eric Weisstein´s World of Science: mathematics, physics, chemistry, astronomy, biographies
  4. - physics // - physics
  5. de/en: openHPI: das Hasso-Plattner-Institut über/about Quantenalgorithmen, Baysian data analysis, programming, etc.
  6. de:
  7. - math & computer science courses, 7-day trial
  8. the ABC of nuclear science - Lawrence Berkeley National Laboratory
  9. Organic Chemistry Help
  10. WiredChemist: Instructional
  11. IAPWS: Int. Assoc. on Properties of Water and Steam, technical guides
  12. Random Thoughts and Fancy Math
  13. medicine: doccheck,

News, Reading & Images

  1. all disciplines: Scientific American,,
  2. Quanta Magazine - physics, mathematics, biology, computer science
  3. popular science:
  4. National Geographic
  5. nature
  6. - physics news
  7. ScienceDaily - latest research news
  8. physics central
  9. NASA: visible earth
  10. NASA astronomy picture of the day archive
  11. crossref: News in English - Science & Technology🗞

Journals, Conferences, Organizations

  1. Chemistry Conferences, org-links
  2. ELifeSciences - Biology, Biochemistry, Ecology, Medicine, Neuroscience, etc.
  3. Science: journals (mostly free)
  4. Degruyter - open access journale
  5. ScienceDirect - physical, life, health & social sciences
  6. MDPI - open access journal publisher
  7. - make your publications visible
  8. PLOS Public Library of Science - open access publisher
  9. bioRxiv - the preprint server for biology
  10. CCSE: Journals (Canadian Center Sci. & Edu.), Asian Journal of Chemistry
  11. F1000Research: open access publishing platform
  12. WiredChemist: Links: journals, opportunities, instructional, databases
  13. ALPO: Association of Lunar & Planetary Observations

Free Journals & Conferences on Artificial Intelligence

  1. JAIR - Journal of Artificial Intelligence Research
  2. Theory and Practice of Logic Programming (Cambridge)
  3. AAAI Conference & Magazine: AAAI Conference on Artificial Intelligence
  4. ECAI: European Conference on Artificial Intelligence
  5. IJCAI (get login, descr.): International Joint Conferences on Artificial Intelligence


  1. open source/GPL: GNU Octave
  2. oss/GPL: Sagemath
  3. Maple (free trial)
  4. MathLab (need to register with email)
  5. Mathematica (at cost)

go to open source🐧, programming💻, go to creativity🖌

go to main index

You know what we don´t? Write us: