  The social community in open source software developers has a complex network
structure. The network structure represents the relations between the project
and the engineer in the software developer's community. A project forms some
teams which consist of engineers categorized into some task group. Source Forge
is well known to be one of open source websites. The node and arc in the
network structure means the engineer and their connection among engineers in
the Source Forge. In the previous study, we found the growing process of
project becomes strong according to the number of developers joining into the
project. In the growing phase, we found some characteristic patterns between
the number of agents and the produced projects. By such observations, we
developed a simulation model of performing the growing process of project. In
this paper, we introduced the altruism behavior as shown in the Army Ant model
into the software developer's simulation model. The efficiency of the software
developing process was investigated by some experimental simulation results.
