Climbing Mt. Kilimanjaro was a bucket list trip for me. When you're prepared for the climb, all you have to worry about is getting to the top. These are the items I took with me. The only thing I wish I had brought were knee braces for the descent! So, I put those on this list.
These applications track your training activities (swim, bike, run, elliptical, strength training, etc.). Some can track shoe mileage, some send alerts when you overtrain, and others celebrate your milestones. They all do one thing: provide data/metrics. These are my favorites.