Microscopy primer - all about microscopy, fluorescence etc.
Confocal Listserver - browse discussions on (confocal) microscopy subjects
ELMI - The European Light Microscopy Initiative is a communication network between European scientists working in the field of light microscopy and the manufacturers of their equipment.
Open Access text book on BioImage Data Analysis.
Spectra of fluorescent dyes
FPbase.org Spectraviewer including dyes and fluorescent proteins and FP database
Fluorescence spectra viewer (Invitrogen)
Fluorescence spectra viewer (BD Biosciences)
2-Photon cross-sections (Cornell University)
Cell-staining simulation tool (Life Technologies)
ImageJ - Freeware image processing software based on Java (Windows, Mac, Linux)
Fiji - Image processing package based on ImageJ
Cellprofiler - Open source image analysis for large datasets
Cellcognition - Open source image analysis for large datasets
FRAPAnalyser (A. Halavatyi, M. Yatskou, E. Friederich, University of Luxembourg)
Euro-BioImaging - Research Infrastructure for Imaging Technologies in Biological and Biomedical Sciences
German BioImaging - Biological Imaging Facilities in Germany
Bioimaging UK - an organic organization of UK scientists that develop, use, or administer imaging solutions for life sciences research
France Bioimaging - Biological Imaging Facilities in France
Italy BioImaging - Biological Imaging Facilities in Italy
Spanish BioImaging (REMOA) - Biological Imaging Facilities in Spain