Here is my ranking of critical applications on my Nexus One and Sony Ericsson xPeria X10 :

Wifi Analyzer – A must for me. You can see the signal levels of the various wifi networks around you. Very useful if you want to find an unoccupied channel to win more stable signal.

Facebook - No comment. It works well, take care of themselves you do not miss anything.

Advanced Task Killer – Task manager free and easy. It is placed on the notification bar and when you kill something, you click and kill, without complications. There ignore list, auto kill and kill massive. We can also set the number of programs that we want this to kill (from single applications to services, care)

MixZing – So far, the only way to listen to mp3 sound equalized … usual response to the question “Android equalizer mp3″ or “music Android EQ” I connect to the bugs in android site so that people will put a star and prioritize this issue .

Astro File Manager – Free File Manager has access module for Windows SMB shares. Ojo, copy, paste and move files, we hold the file or directory and give “Edit”

Mobile BBVA - I am not a client of BBVA, but unlike the Bank of Santander, yes they have done their own implementation. And you will say … If you are not the BBVA, so you use? It has a way of augmented reality Layar style, you cashiers located 4B, and Red 6000 Servired nearby. And to me that if I is useful.

Blink – Freeware, you can set the color of the trackball (“Clit”) for notification of SMS / MMS / Missed / Battery / RAM

Dialer One – Substitute the application’s own Android phone. Among the improvements, a timer calls, their duration (in seconds), normal calls, dial T9 style (I missed my Nokia E66). This last feature is what made me decide for him. I want to call my father and dial 227-272 and I’m checking AaPapa.

eBuddy - I must admit that I have not tried many MSN clients for Android, so I started it safe. I find it not that my login to hotmail in the hands of any company, but I prefer this than the unknown. This does not directly connects you to MSN. You give them your username and password and they make a bridge.

Layar - Augmented Reality. Promises but still I have not drawn all the juice. Representations see in the camera google results for entertainment, etc.

Sygic Mobile Maps – Poor browser port I liked best in Symbian. I say poor port because there is no added anything, it’s a fixed copy of the other. Take an application designed to run on a 200 Mhz CPU and 128 Mb of RAM and copy it to run roughly at 1 GHz and 512 MB of Ram GPU. This is what I have made friends Sygic. And last but not least, have eliminated the possibility of using an external GPS !!!!. Still, I am a creature of habit, does its job and there will continue for now.

RadarDroid – Easy as it sounds. Manage public radar bases, such as that of robs and alerts you when they are next. Warning radar for Android, come on. € 2

Enterprise Remote RDP – RDP Client for Android. Use this program to access via RDP (Terminal Server) to Windows machines from the phone. It allows transmission of audio and clipboard sharing. With the resolution of Nexus One looks good, only tried it via wireless. $ 19.95

VNC Remote Pro – I have not tried yet, but I use RDP or SSH, but have it look good. $ 5.98

RingDroid - Choose an mp3 of your MicroSD and select the piece you want as a ringtone. It does this at the beginning, middle or end, or you want to select 1 second or 10 sound.

SayMyName Dessert – Another thing I missed from my Nokia E66. It tells you to speech (TTS) “Mama calls you” or “Message of Carlos.” Free

Shazam – Free, although they have changed the way you use and if you’ve never used, limiting the tags you each month. It is a hunting song. You are in a bar, or listening to the radio, you want to know what it is called a topic … Shazam almost certainly gives the name.

Sound Manager - When the volume levels of the system are a little crazy, I just opened this application and bring some order.

Sweet Dreams – Application anti-called stoppages. Programs a sleep schedule, for example, Monday through Friday from 00:30 to 7:59. The phone automatically goes into sleep mode. You can set to mute, turn off 3G, turn off wifi, etc. Indispensable, Spanish and free.

TapaTalk Pro - Application for forums. So as it stands. Enters your usual forums (must have a tapatalk module installed) and much easier to read, reply, etc.

WaveSecure - the perfect invention. The trouble, they know and what they charge. Application that allows you to lock your phone if someone changes the SIM. It also allows, and this is good, locate on a map, block it with a personalized message from their website … $ 19 per year.

Weather & Toggle – This if I have bought me. $ 2. Watch style that has HTC Sense in the home screen.