  In Software Engineering, some of the most critical activities are maintenance
and evolution. However, to perform both with quality, minimizing impacts and
risks, developers need to analyze and identify where the main problems come
from previously. In this paper, we introduce DR-Tools Suite, a set of
lightweight open-source tools that analyze and calculate source code metrics,
allowing developers to visualize the results in different formats and graphs.
Also, we define a set of heuristics to help the code analysis. We conducted two
case studies (one academic and one industrial) to collect feedback on the tools
suite, on how we will evolve the tools, as well as insights to develop new
tools that support developers in their daily work.
