  We study the behavior of the tree-level S-matrix of a variety of theories as
two particles become soft. By analogy with the recently found subleading soft
theorems for gravitons and gluons, we explore subleading terms in double soft
emissions. We first consider double soft scalar emissions and find subleading
terms that are controlled by the angular momentum operator acting on hard
particles. The order of the subleading theorems depends on the presence or not
of color structures. Next we obtain a compact formula for the leading term in a
double soft photon emission. The theories studied are a special Galileon, DBI,
Einstein-Maxwell-Scalar, NLSM and Yang-Mills-Scalar. We use the recently found
CHY representation of these theories in order to give a simple proof of the
leading order part of all these theorems
