Houmongi,Tsukesage

Houmongi:

Formal kimono for formal occasions.
It's like an "evening dress", it can be worn by unmarried and married women as well. The placing of the pattern is quite fix (main patterns are always on the upper left and lower right parts).
It can have mon (family crest) but not necessarily. If it has one, the rank goes up. Worn with fukuro obi.

Tsukesage:
Almost at the same rank as houmongi kimono but depending on the design, it's a bit lower, as usually tsukesage has a simplifyed pattern than houmongi.
Therefore its rank is a bit lower, though it can also have mon (family crest) but not necessarily.
If it has one, the rank goes up. Usually worn with fukuro obi. Good for going out for formal or semi-formal occasions.