This get’s a little difficult in the Android world because there is the Rooted and Un-Rooted world to think about, and the abilities of the two are different.
Let’s start with the stuff everyone can enjoy first.
Amazon AppStore – Not technically an App, but a useful place to find them. Unfortunately though it’s only available for the US audience. Sort of. Pop over to Paul’s post on Modaco for the international install.
Angry Birds – 3 Versions available now, all fun and while away the time.
BTFon – Worth having if you have a FOn or BTOpenZone account.
BBC iPlayer – iPlayer mobile
Chrome to Phone – Opens a link on your device, directly from a click in Chrome on the PC.
Apps Organizer – Does what it says on the tin. I use it in conjunction with…
Multicon – Allows you to create multiple icons in one widget space. Great for the home screen.
Barcode Scanner – Scans most anything, including QR codes.
Dropbox – Dropbox client.
ES File Explorer – Best all round free explorer for file system and network
GMote – Remote control any PC. Also allows streaming music as well now.
Handcent SMS – Replacement to the standard SMS client. Supports plugins including Emoji and lots of other things.
Hullo Mail – Intelligent voicemail, push notifications, push to gmail allsorts of stuff.
Google Music – Sync’s your local collection to the cloud, allows it to be played anywhere your device has a connection.
Spotify – In a similar vain to above, however needs a Spotify paid account.
Notifo – Not in the market yet, but available to try out. Push notifications for all sorts, including Twitter.
Twitter – Official Twitter client. Works and always reliable.
Twidroyd – My current favourite Twitter client. Although had a couple of FC’s
Plug in Launcher – Get your device to do stuff when you plug things in (Headphones, Power, USB). Can launch any app on the events, as well as do some basic commands
Tasker – If you want a little more power than Plug in launcher then this is the app for you, the possibilities are endless as to what can be done with this application. Have a look here for some of the info on what’s possible.
Mobo Player – Media player, plays pretty much anything.
SMS Backup+ – Backs up your SMS messages automatically to your GMail account
Spare Parts+ – Tweak and change a bunch of Android stuff. Think of this as the options missing from the Settings app.
Sweet Dreams – Sets ringer and device profile based on time/location/surrounding noise. It’s an Auto Nightmode app basically. It’s great though because it’s fire and forget
Thrutu – Not 100% about this one at the moment, but seems useful. Pop’s up when you make a call and offers extended interactivity with the other person as long as they have it as well. Stuff ranges from doodling, location, Paypal transfers and various others.
Uninstaller – Does exactly what it says. Uninstalls apps without the need to go into market or settings.
There is obviously a whole bunch I’ve not mentioned as I’m sure you have bumped into them already (Paypal, Ebay, Earth, GMail, Maps/Nav)
Have I missed owt? pop em in the comments and I’ll update the post.
More to come, next up, Android the Rooted tool… and then Windows Phone 7…