Federal Student Loan Consolidation is the most common type of program for consolidating student loans online. Federal loan consolidation refers to Stafford Loans, PLUS loan, Perkins and all other Government sub and unsubsidized loans awarded after you filed the Fafsa (Free Application for Federal Student Aid). Below we’ve listed only the most trusted college student loan consolidation companies that feature some of  the lowest fixed rates, while providing excellent customer service. Customer service play an important role in maximizing your savings: 

NEW: Student Loan Headquarters - Consolidate Private and Federal student loans to as low as 6% in some cases. Fill out one secure, no obligation form and have the lenders consider your application. No credit check unless you have private loans. Free service.

Collegiate Solutions Federal Student loan consolidation - refinancing school loans.

They offer a good consolidation product. Customer service is good. This company has been around a while.
-No Credit Check
-Lower monthly payment as much as 40%
-Interest rates less than 7%,
You can reach them by phone  toll free at 1-877-490-6639.

Student Loan Consolidator - Consolidate all of your federal stafford loans, PLUS and other government student loans into a bran new consolidation loan, reduce your monthly repayment amount and lock in to a lower fixed interest rate.

* Interest rate as low as 6%.
* * Reduce your interest rate 0.6% by consolidating your federal loans during your "grace" period.
* There are no fees, no credit checks, application or origination
   charges associated with your application.

Other helpful student consolidation sites: Consolidate Student Loans provides another similar type of lenders that consolidate student loans online.