All in one Export & Import module helps the store admin to import & export the products, product's attributes, product's options and so on.It will save lots of your valuable time. If you want to customize the module, it will be very easy as the coding part is neat & clear. You can also contact me for any customization works.
Really the Time Saver..!!
Now the updated version (2.0) has the ability to add/update the Categories in OpenCart 2.x store ...!!