Databases:

Data Organic Chemistry (very comprehensive)
Data Organic Chemistry – Reich Collection (Hans J. Reich)
Bordwell pKa Table (Hans J. Reich)
Nucleophilicities and Electrophilicities (Herbert Mayr & Armin R. Ofial)
Spectral Database for Organic Compounds SDBS
CCDC Database – Access Structures
Organic Chemistry Portal
Organic Syntheses
NIST Chemistry Webbook

Bibliographic tools:

CAS Journal Abbreviations
DOI identifier

Dealing with energy:

Energy Unit Conversions (Naomi Halas)
Correlation between Energy and Selectivity (Jérôme Lacour)

The appropriate term:

Basic Terminology of Stereochemistry (Gerard P. Moss)
IUPAC Gold Book

Leisure time:

ChemInfoGraphic
Compound Interest (Andy Brunning)
Top-selling Pharmaceutical Posters (Jón Tryggvi Njarđarson)
Disease Focused Pharmaceutical Posters (Jón Tryggvi Njarđarson)
Synthesis Problems (Jérôme Waser)

Work in Music:

Brooklyn – Maputo, Couleur3, RTS