Spectral database for organic compounds
Not Voodoo
Handling air-sensitive reagents (and an earlier version)
NMR solvent data chart
NMR chemical shift of common impurities (and industrially preferred solvents)
Synthesis Workshop: video podcast, focusing on graduate-level advanced organic chemistry
Entos Envision: a fast (GFN1-xTB) and cloud-based molecular simulation tool (conformation, coordinate scan, MO, etc.)