Since the list of small cap funds keeps changing, here is a link to the current ones.
Before you decide to invest in small cap funds, do ensure that you have the risk profile to bear the volatility. While they have given excellent returns over a 5 year time period, the last 1–2 years have been bad for many funds.
Always invest in direct plans with the help of a trusted SEBI Registered investment advisor. Do not fall for fully free platforms as you might end up being the product.