Fontana dei Monti in via S. Vito, by Pietro Lombardi (1927). The hills refer to the logo of the rione Monti.

Fontana di Borgo Pio

Water Fountain with SPQR engraving

Fontana del Facchino, fountain of the porter (Wikipedia).

• [in Italian] Romaspqr.it has a long list with even more fountains.