Car rental for short period

Where can I get a car rental for a short period of time ( maximum of 10 days). I am travelling to Trivandrum and would prefer if I could collect it at the airport. normally i have seen car rentals offer cars for minimum 1 month and not for shorter number of days and also with some kms limits.Any suggestions for affordable car rentals for 5-10 days and which can be driven outside Trivandrum as well?