Several House systems are in vogue in Astrology. The following are some of the house systems included in this package:

Placidus
This system is named after the Italian monk Placidus de Titis (1590-1668).
The cusps are defined by divisions of semidiurnal and seminocturnal arcs. The 11th cusp is the point on the ecliptic that has completed 2/3 of its semidiurnal arc, the 12th cusp the point that has completed 1/3 of it. The 2nd cusp has completed 2/3 of its seminocturnal arc, and the 3rd cusp 1/3.

Porphyry
The MC and ASC are respectively the 10th- and 1st- house cusps.
The remaining cusps are determined by the trisection of the semidiurnal and semi nocturnal arcs of the ascendant. The houses are formed by the lunes created by the true house circles that pass through these cusps and the North and South points of the Horizon.
This varies from other quadrant systems, in which the trisection occurs along the ecliptic.

Koch/GOH
This system is called after the German astrologer Walter Koch (1895-1970). Actually it was invented by Fiedrich Zanzinger and Heinz Specht, and it was only made known by Walter Koch. In German-speaking countries, it is also called the "Geburtsorthäusersystem" (GOHS), i.e. the "Birth place house system". This name was chosen by Walter Koch because he believed that this system was more related to the birth place than other systems. He believed this, because all house cusps of this system are computed with the same polar height, namely with the "polar height of the birth place", which has the same value as the geographic latitude.

Regiomontanus
Named after the Johannes Müller (1436-1476) (called "Regiomontanus", because he stemmed from Königsberg).
The equator is divided into 12 equal parts and great circles are drawn through these divisions and the north and south points on the horizon. The intersection points of these circles with the ecliptic are the house cusps