Hi sir,
I understand your requirement. You need feature product widget ( block ) showing product from different category.
I have already made such widget it easy task for me. You can use that widget on any page (home and category page etc.) on right, left and content section of site.
I can complete it in max 2 day after you awarded it to me as per your requirement.
My $kype id is harshad.goswami. Please contact me.
thanks
harshad