Good morning guys.  I am new in SEO marketing...
Does anyone know any free program that makes keyword analysis or showing me the words used by the competition?
Help me guys... 

Google Keyword planner is one of the best option for you. You can get your best keywords for your project with the help of this tool. It's really the best tool for the keyword planning and selection.

flicmedia very good site for free classified posting

You can also analyze entire keyword usage in a webiste using A1 Keyword Tools - that way you can see which words a webmaster is trying to target with his/her website

i think google keyword planner and keywordtool[.]io are potential.