Organic Synthesis: http://www.orgsyn.org/

Name reactions:  http://www.organic-chemistry.org/namedreactions/michael-addition.shtm

Chemspider synthetic pages: http://cssp.chemspider.com/

Simulate 1H and 13C NMR online: http://www.nmrdb.org/

Common NMR solvent peaks: www.chem.wisc.edu/areas/reich/handouts/nmr/nmr-solvents.htm

Common organic solvents: Table of properties: https://www.organicdivision.org/orig/organic_solvents.html  

http://murov.info/orgsolvents.htm   

Learn spectroscopy: http://www.rsc.org/learn-chemistry/collections/spectroscopy  

Education in Chemistry: http://www.rsc.org/eic/

Learn Chemistry from RSC:  http://www.rsc.org/learn-chemistry/resource/

Reaction map: http://murov.info/rxnmaponline.pdf

Learn chemistry from RSC: http://www.rsc.org/learn-chemistry/resource/listing?searchtext=&fcategory=all&filter=all&reference=lc_india&Keyword=KCN00000012

Interactive periodic table from GelestInc:

http://www.gelest.com/gelest/forms/GeneralPages/metal_organic_catalog.aspx  

Merck Index online: https://www.rsc.org/merck-index  

Acid base indicators: www.roanestate.edu/faculty/chemistry/…/indicators/indicators.pdf

Espacenet online patent search: http://ep.espacenet.com/help?topic=numbersearch&locale=en_ep&method=handleHelpTopic

Online database of articles: https://www.academia.edu/

USFDA guidelines: http://www.fda.gov/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/default.htm

ICH guidelines o quality: http://www.ich.org/products/guidelines/quality/article/quality-guidelines.html

Europe:  EDQM Guidelines: https://www.edqm.eu/en/edqm-homepage-628.html

USA: USFDA Guidelines: http://www.fda.gov/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/

Indian pharmaceutical guidelines: Schedule M:  http://cdsco.nic.in/html/GMP/ScheduleM(GMP).pdf