The 1099 forms series are used to report various types of income, typically not paid by an employer.
These forms can report include payments such as independent contractors, gambling, royalties, rents, interest, dividends etc.
The variants are, but not limited to:
1099-INT reporting interest income
1099-DIV reporting dividends and distributions
1099-G reporting government payments
1099-B reporting proceeds from broker and barter exchange transactions
1099-NEC reporting nonemployee compensation
1099-MISC reporting miscellaneous information
1099-R reporting distributions from pensions, annuities, retirement etc.