Whick springers have least cocking effort ever?

As guys before said:
FWB300 - big, heavy but really easy to cock and mosta accurate from all mentioned here
IZH 60/61 - weird looking but light, easy cock and 5 shot magazine (you get 2 of them with your gun) what make it most popular gun on all of my family parties :) 
CZ (Slavia) 634 is not so easy to cock but for sure easier than Hatsans, Crosmans etc. Easier would be CZ (Slavia) 630 - that for sure. As for availability Slavia is not being produced now for last 1-2 years) but what is interesting in Poland and in most of the Europe since last year you can buy airguns named Perun (730, 731, 734) and they're eactly the same as Slavia (630, 631,634), the same build quality and the same looks. So maby in USA the're or will be avaliable also. 
HW30 - of course - nice, small and accurate
and I would add to that list (as a sister of HW30 - maby even little bit nicer) 
Diana 240 
 
One more to add to the list: Crosman F4 with a detuned Nitro Piston, sold primarily in Canada to meet their sub-700 fps requirement for non-firearm shooting. Found mine on Walmart.com, low cost yet a full-size rifle suited to adults. That means a reasonably long barrel which makes the cocking stroke even easier. At 25 yards my gun is consistently sub-1" and has proven reliable (on fairly calm days) out to 50 yards when shooting clays set up on the target racks. Look into 'em, you'll be pleasantly surprised.