The main objective of this work is to complement the reinforced concrete plane frames design tool already existing in Ftool, an educational tool widely known in academia. Therefore, the design of reinforced concrete columns was introduced. A new cross section for rectangular columns with symmetrical steel reinforcement was added. In addition to that, the inclusion of a simplified nonlinear geometric analysis that was in accordance to the philosophy of Ftool, combining simplicity and efficiency, was needed: the Two cycles iterative method. The nonlinear geometric analysis tool may or may not be used together with the reinforced concrete plane frames design tool, thus allowing for geometric nonlinear analyses of plane frames of other materials. The methodology used for the reinforced concrete frames design was based on solicitation zones and was adapted to be in accordance with the Brazilian code, the ABNT NBR 6118:2014, as was the existing reinforced concrete beams design tool. It is now possible to show results for plane frames composed of reinforced concrete columns and beams just as in the previous version of the reinforced concrete design tool, showing diagrams for the necessary and adopted longitudinal and transversal steel reinforcement.