MyScope - Introduction and e-learning tool to confocal microscopy, SEM, TEM etc.
Microscopy primer - Introduction to Optical Microscopy, fluorescence, Digital Imaging, Photomicrography, etc.
Confocal Listserver - browse discussions on light microscopy subjects.
Fluorescence spectra viewer - You can plot and compare spectra and check the spectral compatibility for many fluorophores offered by Molecular Probes (Invitrogen).
Evrogen Spectra Viewer - This Spectra Viewer tool allows one to compare the spectra of Evrogen basic fluorescent proteins and calculating their excitation and emission efficiencies at different wavelengths.
2-Photon cross-sections - (The Developmental Resource for Biophysical Imaging Opto-Electronics at Cornell University).
See "Contact - The CCI People",