nice idea..is it possible to try and integrate the "CA" picture above the text, into the text, for instance take the "A" in "CodeAid" and replace it with the picture mark and perhaps change the mark a bit so it don't contain the "C" aspect?
#5 & #6 look too much like hammer and sickle and the whole "aiding" part is lost. However, the circle and line play has a great visual potential. The cleanliness presented by proposal #6 is preferred over #5