im not actually sure of any tools that work like yast but there is
apt-get which coupled with synaptic make a great combination,
download the appropriate files to install apt-get,
run
apt-get update
then run
apt-get install synaptic
it installs all dependant files and can upgrade the files already installed on your pc.
there is also yum but i havent got a clue what kind of interfaces there are for it.
hope it helps
Matty G