Here with i ahve given some of estimation tools ...

1. Tool name : QUEST

It is Excel based estimation tool. Supports COCOMO II

estimating factors, Function Point estimating, and

statistical estimating methods

2. Toll Name : Goldenseal

Small business software to cost estimation and project

management

3 Function Point Modeler

Estimation tool based on Function Point Analysis,

UseCaseModel, Business Object Model and Data Model.