Probability distribution database

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Is there some kind of probability distribution database? Very often I'm faced with a problem of fitting a distribution to data. And it also happens very often that exponential-looking data doesn't fit to exponential distribution. But because my "internal database" of PDFs is not large enough I have to compromise. Is there some place that I can use as a resource to seek for another options? Preferably with suggested methods how to (efficiently) test fit to that distribution.