I'm looking for a program (pref FOC) which will help me create simple 2D line drawings.The image below gives the gist of what I'm trying to achieve.

The free online (web) application Project Draw may be enough for this - you can try it at:
http://draw.labs.autodesk.com

Thank you for your response. Unless I am mistaken, there is no facility to draw lines, dims are only temporarily displayed and are only displayed in integers.Am I missing something??