[R] Zero Inflated Distributions

[vioravis]

I am currently fitting the following distributions using JMP and looking for
ways to fit the same distributions in R:

Zero Inflated Lognormal
Zero Inflated Loglogistic
Zero Inflated Frechet
Zero Inflated Weibull
Threshold Frechet
Threshold Loglogistic
Threshold Lognormal
Log Generalized Gamma
Threshold Weibull
LEV
Logistic
Normal
SEV

Are there any packages that contain these distributions??? I am specifically
interested in the zero inflated distributions since the data I have contains
quite a bit of zeros.

Thank you.

Ravi

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