This is my own build, and I tested it myself. I find it better than the most published builds, so I decided to post it myself. It may seem well.. untypical, but just read before commenting/voting please ;)

This is also my first build, so please be forgiving :)

I use flad AD marks, armor seals, attack speed glyphs, and AD per level quintessences.
Why? Well, armor is quite obvious for a jungler. As for flat AD, which may be the most uncommon, its also because we need strenght on jungle especially on the beggiing. That is because I suggest NOT buying the lantern. Ad per level Quintessences give us a few extra AD points in the end, which is also nice ;)

Here is the part most uncommon for jungle builds. I start with the scepter, then buy the boots and then BF sword. something missing? Not really. U will find quickly, that you are able to make the first ganks even before buying the boots, thanks to our q, which grants us extra speed. Thanks to that, if u are a little lucky, you can buy your bf sword even before gettting lvl 6. And after that, it's just easier and easier...

We start with Q for dmg on first monsters in jungle. Then we take W for some extra attack speed. That allows us to jungle freely. Then we max Q and E, leaving the W. It's active does not differ at all at next lvls, and extra attack speed is much less important then dmg (Q) and fear (E)

Most standard path as possible. You start with Blue, you proceed to wolves, than wraiths, golems, and red. why is red at the end? because of smite cooldown, of course. Now You go back to wraiths again, and actually, you can start your first gank at mid already. If it's pushed, or not possible to gank for any other reason, you do wolves, and try to gank mid. As soon as You have 920 gold, you go back for the boots, and then you are OP ganker (with Q- always use it from the brush and try to hit your target exactly. not even for the dmg, but for the trail, which grants bonus speed and AD).

GOOD LUCK SUMMONERS!!