I was a bladeforums member before a BPL member, so becoming ultralight in the knives department is tough for me!
I did however recently pickup an Izula, and it has been great so far! My pack has some small pockets on the belt, that the belt passes through. I've put the knife in this spot between the belt and the pocket. I attached the sheath with a small piece of rope, so I have quick access to the knife. This might be hard to visualize, but the knife just becomes part of my pack.
I'll second the Gossman PSK as well. Great knife with good reviews. He mostly does convex grinds, and I prefer a flat grind. I also like the coating on the Izula as it's always wet here, I'm frequently by water. RAT is a great company that stands behind their products.
There are SEVERAL other knives in this category that people on bladeforums make. However, I've yet to find something that I like better than the Izula. With it being skeletonized, you get a bigger knife than some others. It is also very comfortable in hand. I have big hands, and think that some of the smaller knives would be hard to manage.
If you are looking for a knife, and have some specific thoughts of what you would like to see, head over to bladeforums and look around. There a lot of makers in the Wilderness and Survival forum who design knives to fit into small tins for "survival kits".
The Becker Necker, now made by Kabar, is another similar knife, though it's a little heavier.