We have several (hopefully) useful tools and calculators here at DOCTORED MONEY, most of which you can use right in your browser. They are listed below with brief descriptions. 

Simple SAVE/PAYE/IBR Payment Calculator -- Also calculates your PAYE/IBR maximum payment AND the income needed to reach it. This is necessary to know whether you have the "partial financial hardship" needed to enter PAYE/IBR.

SAVE / PAYE PSLF Optimizer -- Enter your loan info and estimates of current and future income for you (and/or spouse) to evaluate which plan is best for PSLF.

Federal vs Private Loan Refinance Calculator -- The only calculator we know of specifically designed to compare federal loans to private loans.

PSLF Payment Tracker -- Downloadable Excel spreadsheet to keep track of eligible payments and other data. You'll absolutely need a "from-day-one" record if your PSLF-eligible loan payments are miscounted by your servicer. Unfortunately, it happens often. Each undercounted payment can cost you thousands in lost forgiveness.

Weighted Average Interest Rate Calculator -- When consolidating, your existing loans will be collapsed into one loan (or two if a mix of subsidized and unsubsidized loans). Use this to find your new rate.

Withholding Calculator -- Calculate your IRS withholding in advance based on how you fill out your W-4.