Michal is an open source developer, mainly coding in Ruby and Shell. He loves to help others - to the extent it become his life mission to "make the world a better place". For last 4 years he maintained Ruby Version Manager, but as of last month he focuses solely on finishing RVM v2.
RVM was the first version manager for installing Ruby, to solve problems like switching Ruby versions or separating project gems. Today RVM is still leading in the area of installing and switching Ruby, yet Papis is working on a version 2.0.