Like Earth, other planets in the solar system are tilted about their own axes. This tilt could have arisen from the collisions between planetesimals during the formation of planets in the solar system. The larger the tilt of planets from the Sun, the more extreme the seasons are.
The best example is Uranus, with a tilt of 97.77°. During the solstices, one pole of Uranus directly faces the Sun while the other pole is completely shielded from the Sun. Hence, each pole of Uranus experiences 42 years of daylight followed by 42 years of darkness. Due to this extreme tilt, only a thin strip of Uranus near the Equator experience a semblance of the day/night cycle. The unusual tilt of Uranus might be due to multiple collisions instead of a single major collision of a Earth sized protoplanet, as predicted by computer simulations. This suggests that the early solar system might be a more violent place than we imagined it to be!
On the other hand, Mercury has almost no axial tilt. This means that Mercury does not experience seasons.
Tilt of other planets...
References
Morbidelli, A., Tsiganis, K., Batygin, K., Crida, A., & Gomes, R. (2012). Explaining why the uranian satellites have equatorial prograde orbits despite the large planetary obliquity. Icarus, 219(2), 737-740.
Figure modified from http://www.astronoo.com/en/articles/axial-tilt-planets.html