Simple Savings Calculator is very easy to use, but powerful.
It provides the following features:

(1) Calculates the estimated savings balance based on:
- starting amount
- additional contribution (monthly, bi-weekly, weekly, quarterly, or annually)
- investment rate (%)
- interest compound option (annually, quarterly, monthly, or daily)

(2) Estimated Balance (= principal + interest) by year

(3) Cumulative Balance by year

(4) Results Summary Report with charts

(5) You can save various savings scenarios and compare them