I am a semi-retired real-time developer (1979 - 2012) conversant with old languages such as C/C++. I am re-entering the market to develop an application dealing with the display of simple graphic objects (coloured circles and other shapes) and measuring time-to-click (to an accuracy of 1/100 seconds). I will start with a PC platform as I am familiar with it and eventually move it to a tablet/phone.
Can someone recommend a cheap/free development platform/language which would facilitate my re-entry into the development world and eventually allow me to develop phone/tablet applications. Thanks, KevanK