What are some examples of Protestant religions?

Strictly speaking "denomination" is the better term for your question than "religion". Denominations are the subdivisions or varieties within a religion.

Within Christianity there are many denominations. The denominations which are called Protestant share common roots in the Reformation of Roman Catholicism in the 16th century.

Some examples of Protestant denominations would include: Lutheran, Baptist, Anglican/Episcopalian, Presbyterian, Evangelical Reformed, Methodist, and Congregationalist.