FinFETs can be described by the BSIMCMG model, whose Verilog-A code is available from Berkeley university

http://www-device.eecs.berkeley.edu/bsim/?page=BSIMCMG

What you need is a simulator interpreting Verilog-A and you can simulate the FinFETs by using this model in your circuits. Moreover, you may need realistic values of model parameters for a FinFET technology or better a design kit of such a technology. But design kits are typically available just for commercial tools (e.g. Cadence).

Thank you sir

But for Simulating FINFET based circuits, is there any EDA(like SPICE) tool?

These is not a specific tool. Any Spice-like simulatior can be used to simulate circuits with FINFETs, provided that suitable models of the FINFET are included. One of such models is the one I have referenced in my previous answer.

thank you sir for valuable guidance..

You can also find model cards of FinFET transistors on PTM model from ASU (Arizona State University)

http://ptm.asu.edu/

Thank you for give me direction for fulfill my work

yes sir, Model cards of FINFET are available on PTM actually i want that any simulator which supports it....?

Hspice and Spectre are able to simulate circuits based on these model cards

thank you sir...

You're welcome

Hspice and Spectre are they open source software?

You can get a good results using LT Spice and Predictive Technology Model (PTM).  If you do simulation study, this will be enough for research and publication without using Spectre which is not an open source simulator