For commercially used fluorophores such as Coumarins good resources are Lambdachrome Laser Dyes - Ulrich Brackmann:

http://www.chem.ucla.edu/~craigim/pdfmanuals/catalogs/Lamdachrome-laser-dyes.pdf

Also the Molecular Probes Handbook:

https://www.thermofisher.com/uk/en/home/references/molecular-probes-the-handbook.html

Thanks so much!

plz, if you discovered more resources, let me know.

NIST has the most comprehensive database. The UV-vis spectra are always presented as a dependence of the extinction coefficient on wave length. What is the problem converting Log e to e? e =10^(LOGe). 

Hi Yurii,

The spectra of NIST are available as images, not data points. So, how i can covert the y-axis to Absorbance.

You can digitize it using a free software, e.g.

http://engauge-digitizer.soft112.com/