Bank Rate Monitor 
Provides rates on savings, mortgages, auto loans, home equity loans, credit cards, checking account, ATM, and online fees. 

Calculators On-Line Center
This site contains thousands of links to calculators for various subjects. The calculators in the Finance and Finance-Personal Category include calculators for following categories: Banking Calculators-Checking; Debt Consolidation; Interest and Investment yields; Loans; Savings; Credit; Credit cards; Estate; Investment and Net Worth; Salary and hourly wage; Retirement & Benefits (Annuity & IRA etc.); and Tax Calculators World wide.

Cost of Living Calculator

Current Value of Old Money
Answers the question, 'how much would a specified amount of money at a certain period of time be worth today?' Includes currencies from several countries.  

Financenter.com
A collection of personal finance calculators covering homes, autos, credit cards, investing, planning, banking, and insurance.

Inflation calculator
This site is provided by S. Morgan Friedman, and adjusts any given amount of money for inflation, according to the Consumer Price Index, from 1800 to 1997 

Measure 4 Measure 
A meta-list of online calculators.

Online Conversion
This site contains over 8,000 conversions organized by type. Examples: pints to ounces, Fahrenheit to Celsius, hours to seconds. 

Salary Calculator

Compare cost of living in hundreds of US cities

What is a dollar worth?
Enter any year from 1913 through 2000 and a dollar amount purchased. The "CPI Calculation Machine" produces an equivalent dollar amount for that year. The calculator will work both forward and backward in time. The site also provides an annual table of the CPI-All, from 1913.