[Vibrant Q&A, Help & Troubleshooting] dandab:
I'll take a shot at this. This is not any any particular order. Just the order that it popped up in my head as i thought about this.

1. Google Music (free) - google music is one of the handiest apps that I have. I'm able to access all 15,000+ songs in my library remotely, and my computer doesn't have to be on. I used an app called subsonic before, but it required you to run your computer as a server which meant your computer had to be on. With Google music, you upload it to their servers once, and then you can access your music from any mobile device/computer. the downside of this service, though, is that it takes a long long long time to upload. perhaps it got better since i first used it but just know that it'll take a few days to upload anything if you have a large library of music

2. Pandora (free) - If you ever get bored of your own music and you're looking for new artists, pandora is great. I'm sure you already know about this service and everything they do already, but one of the things I really like about pandora is that the sound quality of their songs are pretty great. sounds good when i'm biking with my headphones on or if I plug it in the auxiliary. I always catch myself being impressed with the quality.

3. Power Amp ($5) - my last recommendation having to do with music. This is a great music player with lots of customization and sound control. You can't go wrong with buying this app. I especially enjoy the ability to fade in and fade out of songs when i'm skipping through them. pay for it and support the devs that put the time into this app because he definitely deserves it. free trial is also available.

4. Netflix (free with subscription) - Why wouldn't you get this if you already have a netflix instant account. free app plus you get the entire netflix library from wherever you are. I've been having some A/V sync issues with it lately but i haven't tested the new update. I'm sure they'll get it all straightened out in time. I have definitely been waiting for this app for quite some time and I'm just really thankful we have it now. :D

5. DoggCatcher ($7) - This is a bit pricey but if you listen to a lot of podcasts, this is the best app by far. keeps everything very neat and organized. does a lot of cool automatic stuff like only downloading podcasts when you're on wifi, or when you're on wifi and charging. This also supports Presto ($4) which allows you to listen to podcasts at variable speeds.

6. Amazon appstore for Android (free) - You can't get this on the market but just google it and get it on your phone because they give you a free app everyday. it's like woot for apps on your phone but it's free. the free apps can be very crappy or very good. Another plus is that all app purchases, free or paid, are linked to your amazon account so you own them forever.

7. Paypal app (free) - My friends and I always cover each other for food and expenses and this app makes it easy to pay each other back. Requires you to have a paypal account linked to you checking account but as good as cash itself. BTW, make sure you link it to your checking account and not your credit card or else you will get transaction fees. no fees when you use your checking. Also, the app comes with a bill splitter so you can easily split bills, even if it's not split evenly.

8. Handscent (free) - I use this app over the default texting app with the metallic theme. Looks nice and you can also do a lot of customization. my favorite thing is the quick reply texting feature.

9. Alarm Clock Plus (free with ads. $2 ad free) - alarm clock that's a lot like other alarm clocks in the market but i like that when it goes off, you can change the snooze timer right after you hit it instead of setting the snooze before you sleep. sometimes, i just want 10 more minutes of sleep.

10. Thumbkeyboard (one of amazon's free apps but about $3 on the market) - keyboard is really based on your preference but i like some of the layouts for this keyboard. It was weird at first but i found myself typing really fast using the "split - Compact layout" with a lot less spelling errors and autocorrect errors"