You know you can post to Flickr directly from Instagram and if you have an iPhone (not sure if Android does the same) you can post directly from the IOS share menu.

I use PackingPro for packing lists, TripIt to track everything (trips, hotels, etc). I use my contacts app on IOS to store important things like consulat/embassy, bank and credit card contact data.

Instagram and IOS for Photos, sometimes I like playing with Hipstamatic for different (maybe better) effects and options than Instagram provides for photo editing.

For any sort of travelogue, I just write in a text editor and later add to a blog (wordpress) on a hosted server I rent. I don't write as often as I should though, sadly.

For "real" photos, I use my a6000 and process everything in Lightroom which uploads automatically to Flickr, Facebook and SmugMug. SmugMug is the only one I actually pay for. I used to have a Flickr Pro account but then they removed pretty much every incentive to pay for the service.

Ummm... Google Maps for getting around. Apple Maps is supposed to be a lot better than it was, but I still end up using Google Maps by default. Google Translate is also pretty good. There's also a really nice translator called WayGo that I use whenever I'm in China or Taiwan. It works REALLY well for translating restaurant menus and other things. Google Translate is probably as good now, but I've been using WayGo for years and I like that it will work on Chinese, Japanes and Korean.

That's it. I also like to pick up local subway/transit map apps for places I go, though Google Maps does a good job of door-to-door public transit routing now.