Drop is an inter-project dependencies tool that binds functionality of source control systems, autoconf scripts, make and package managers.
There are a lot of tools orchestration and deployment to production but very few tools to help someone configure a machine for development. dws is just a tool.
At its core, dws helps to run multiple sequences of dev commands in topological order. ex:
git clone _repo-1_
./configure
make
make install
git clone _repo-2_
./configure
make
make install
is replaced by a single command:
dws build _myproject-and-prerequisites_.xml