Jerad covered the ones that I am knowledgeable on. I am sure there are other types within these categories but they are very specific to certain situations like college loans and medical loans.
jerald: These are the ones I know of off the top of my head:Unsecured personal loansSecured personal loansFixed-rate loansVariable-rate loansDebt consolidation loansCo-sign loansPersonal line of creditThey each have their own rates and stipulations.
@jerald I only knew about a few of these. I had no idea there were this many different ones but I guess it makes sense since different loans deal with different levels of interest, guidelines, and credit scores.