Adding in a couple more quick ideas that I had while sitting at work today...
A simple key silencer for those of us who don't have a Key-Bar

This one is a simple one that i like to refer to as "Reliable fire", you get a few things all at once with this, the obvious bic lighter and a ferro rod, you get a little backup tinder by using the inner tube and the lighter, and it works as a lock for the lighter, with the tube blocking the lighter button, it cant leak out if accidentally pressed in a pocket or pack, and when you want to use the lighter, you can use this trick:

keeps the lighter lit until you're done, this is exceptionally useful if you need to light something at an odd angle where you would typically burn your finger(s) in the process.

finally, a blade cover for anyone shipping a knife without a sheath. cheap and effective.
Ok, now I'm going to hold off for a little while and let some other people get their ideas posted.
Good luck everyone, lets see those ideas!!!
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Added on July 19th 2015
adding a few more simple ideas now that things have started to pick up
The original intention of this one was going to be used with a Nalgene bottle or 40oz klean kanteen (my favorite) but due to the largest inner tube not fitting, I had to downsize to a smaller metal bottle. - I was able to coil a ton of fishing line around the bottle, then roll the tube over it to keep it in place and dry - i didn't have any available for the pic but there would be no issues fitting in a couple hooks vertically as well. - emergency fishing kit with your water
The inner tube wallet - great for all of the minimalist guys who don't want to carry much
(FAILED ATTEMPT DETAILS) the one failed attempt that I tried was a variant of the waterproof dry bag that someone else posted. I was hoping that you could melt the end shut to seal it instead of rolling but alas - this stuff burns instead of melting, Im thinking about trying to find some adhesive that would work to seal it
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Added 7/27/2015
I kind of like this one - great way to carry spare batteries and protect the terminals as well
Had a few more failed attempts as well. Tried to make a little water bag similar to someone else's dry bag but instead to store liquids (kind of a long shot) but couldn't get a good enough seal. Ideally it could have been a decent way to carry a bit of Vaseline for on the fly fire starters. - looks like ill be sticking to old film canisters for that
also tried to make ankle wraps - use an extra large piece to go around the end of your pant leg around your boots to help keep anything unwanted out of your pant legs, seems like it should work well with some larger tubes, (dirt bike size maybe?) so ill have to keep this one in mind for non-contest use since the contest materials were too small to fit over my foot haha
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Added on 7/29/2015
Had some free time this morning so i decided to break out the box of inner tube and see what else i could come up with - fairly happy with the results
this one seems fairly obvious, though it does work well. various size inner tubes work very well to keep 550 cord (or any other cordage) neat and together (this is so messy because that 550 cord had been wrapped around the handle of my bk14 for about 2 years lol
Unfortunately my fiancé isn't around to help me test this one, but in a pinch in the woods it appears that a thin piece could work well as a hair tie (not sure if it would pull hair too much - anyone with long hair feel free to test and let me know lol)
thinking back to the original idea, i wanted to see if i could use just inner tube to fit the contents of an entire survival tin onto a small sheath - turns out i was able to get 90% of it on there - some of the little stuff would have fallen out

so here you can see the contents of what i was able to fit on the sheath of my bk14 - a SAK farmer, ferro rod, the little black square is a cotton ball with vasceline wrapped in electrical tape to keep things clean, and the lighter is wrapped with about 50ft of fishing line, and has a few small hooks as well, all of which is then wrapped up in electrical tape to keep it from going everywhere and uncoiling
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Added July 30, 2015
This is an idea i had that steps a little away from survival and bushcraft but could be a MAJOR help for people camping. If you're like me, for most car camping trips, at least one person always has a guitar, but rarely do they have a capo for higher tuned songs - with a medium-large piece of inner tube cut nice and thin, i was able to use a ferro rod as a serviceable crossbar of the capo. it is definitely not as perfect as the real thing but it actually worked and played pretty well! I highly recommend trying this for any other guitarists among us
and some close-ups
Very happy to have been in this contest - I've already added some of these ideas as full time usage
Once again big thanks for starting this extravaganza!