Silicone

All varieties:
Silicone HM
General purpose, high modulus white, clear or brown.
Silicone 3S
Sanitory grade with fungicide white or clear
Silicone LM
Low modulus, for high movement white, clear or brown.
Silicone
Multi purpose sealant that seals in wet conditions (heading from Nick)
Sticks-like-Nails
Solvent free, gap filling adhesive