With more than 500 android phones there are lot of buzz in android applications development (If you are interested in development then you can also watch Android developers talk about their android applications) and there are many kick ass apps available in google play market.

Before checking the android apps list, have a look over the introduction to Android

Before Starting: Learn how to download Android applications

To download android applications into your mobile phone you just need to launch the android market in the application menu, search for “desired application”, and easily install them.

Here is the list of 30 Best and free Google Android Applications available in Android Market.

  1. Facebook – Share and stay connected with your friends with the Facebook for Android app.
    Facebook for Android makes it easy to stay connected and share with friends. Share status updates from your home screen, chat with your friends, check out your News Feed, review your upcoming Events, look at your friends’ walls and user info, check in to Places to get Deals, upload Photos, share links, check your Messages, and watch videos.
  2. Foursquare – Foursquare helps you explore the world around you. Keep up with friends, get insider tips, and unlock discounts and rewards. While on the go, you can easily tell friends where you are, share pictures, get their comments (“I’m right around the corner, I’ll stop by to say hello”), and get insider tips (“order the Lobster Ravioli; it’s the best dish by far.”). Tons of places offer discounts and freebies to foursquare users, and you earn points and badges for doing the things you love.
    Note: You can also look into updated features of FourSquare together with hands on video.
  3. Gowalla – Gowalla is the easiest way to share places you go with friends. Gowalla is a social travel guide that makes it easy to keep up with friends, share photos, highlight your favorite places and discover the world around you. It’s like totally available EVERYWHERE, so you’ll be able to record and share your adventures no matter where you go. Check out hands on video of Gowalla for android with updated UI.
  4. Photoshop Express – Edit and share photos virtually anywhere. Access them all on Photoshop.com. Edit and share photos virtually anywhere. Touch to crop, rotate, adjust color, and add artistic effects. Access all your photos and videos directly from your free Photoshop.com account. Quickly share with family and friends. Requires SD card. Checkout the detailed features and demo of ADOBE PHOTOSHOP EXPRESS for Samsung Galaxy Tab.
  5. Thinking Space – Create visual thought maps that help organize and plan your activities and ideas. Thinking Space is a Mind Mapping application for Android.
  6. Speed Test – Speedtest.net is now available as a native Android application. Speedtest.net is now available as a free Android application with no advertising! Use it to measure the network speed of your Android device. With over a million tests performed every day, Speedtest.net is the ultimate resource for bandwidth testing and related information. Check out the demo of Speed Test on Samsung Galaxy Pop CDMA mobile.
  7. Shazam – There is an excellent application for mobiles named “Shazam” which can easily search, tag and discover music from mobile phones. You can easily get this from android market.
  8. Hi AIM – Its an AOL Instant Messenger(AIM) client for android. Data sent through network. No SMS fee. Support for smileys and chat bubble styles.aim thumb 30 Free Google Android Applications
  9. Twidroid – Its a one of the market leading twitter client on the android platform. today we’d like to share a sneak peak of the forthcoming twidroid pro – a new milestone release that will extend our current product line and includes features such as: multi-account support ,video posting, desktop widget, bit.ly support, follower listings, interface themes and others.twidroid 30 Free Google Android Applications
  10. Loopt – It connects you to your friends and the places around you. See where your friends are and what they’re doing. Connect on the fly and instantly share photos, comments, and cool places. Turn your phone into a social compass and never be bored or lonely again!loopt 30 Free Google Android Applications
  11. FBabble – It lets you stay in touch with your friends on Facebook wherever you go! Features include real-time chat, uploading photos, changing current status and even automatic tweets to your Twitter account.fable 30 Free Google Android Applications
  12. Opera Mini – It can browse the entire Web on your Android phone and save time and money. Opera mini is compressing pages up to 90%, making web browsing fast. Synchronize your bookmarks, history, notes and more between your computer and mobile phone, and a lot more…

    operamini thumb 30 Free Google Android Applications

  13. 10001 Cocktails – Its another bartender in your pocket! Browse and search our most popular recipes on your phone by drink type or search thousands of alcoholic and non-alcoholic drink recipes on the shot-cocktail-recipe.com web site! Add fresh drink ideas and drink reviews and save your favorite drinks to your personal list.Cocktails 30 Free Google Android Applications
  14. ChompSMS – With a great UI, chat style SMS bubbles, touchscreen keyboards and many other great features! Also coming soon, T9 predictive touchscreen keyboard and color customizations.ChompSMS thumb 30 Free Google Android Applications
  15. Note Everything – A notepad application where you can create different types of notes in one app, including text-, paint-, voice-, checklist- & photo notes. Your notes can be organized in folders. You can create shortcuts on home, send notes, search, encrypt, reminders, use live folders & much more! All in the look & feel of Android UI.noteeverythinglg02 30 Free Google Android Applications
  16. Voice Recorder – This application is a handy voice recorder. The data are recorded to a SD card. Available the following items on the Voice Recorder – send a data as attached file via Gmail – timer & background recording – search by TITLE and DATE – register to ringtone.voicerecorder 30 Free Google Android Applications
  17. Lyric Search – Lyric Search searches LyricWiki.org for Lyrics to virtually any song. Search by artist or song name, copy and paste lyrics into sms, email, or other applications, and save lyrics or buy the song on amazon mp3.lyrics 30 Free Google Android Applications
  18. Comeks Fun Photo Blogger – IT can create and share funny cartoon-like images. Take and filter photos, add stickers and text bubbles on them. Lots of stickers and text styles to choose from. When done, share the funny image in Facebook, Tumblr, Flickr, Bebo, Twitter or Comeks.com. You can also send it as an email or MMS.comeks 30 Free Google Android Applications
  19. Pickup Lines – It can find out how to approach the other sex! With this app you can share your best pickup lines and view and rate the ones others have added. And send funny lines to your friends!

    pickuplines 30 Free Google Android Applications

  20. Save MMS – This application allows you to save pictures, audio and video from your MMS text messages directly to your memory card. Attachments are stored in the “SavedMMS” directory and are automatically accessible from the Pictures and Music apps.

    savemms 30 Free Google Android Applications

  21. Last.fm – Personal Radio – Your personal radio station on your phone: Choose an artist or genre and Last.fm builds the perfect playlist just for you, fresh every time, featuring your favorites and new discoveries powered by millions of Last.fm users sharing the music they love. You can skip any song and find out about concerts, too.last.fm 30 Free Google Android Applications
  22. MultiReader 0.6.1 Text-to-speech app that reads your documents to you. It can speaks your document : text, PDF, Word, RTF, PPT.

    Note : this application which is designed primarily for adults and upper-level students can be sold on PDA, GPS, car embedded system, electronic paper (available in a near future).

    multireader thumb 30 Free Google Android Applications

  23. My Tracks Record GPS tracks. Monitor your performance. My Tracks enables you to record GPS tracks and view live statistics while hiking, biking, running or participating in other outdoor activities. Once recorded, you can share your tracks with friends, upload them to Google Spreadsheets, and visualize them on Google My Maps.

    mytracks 30 Free Google Android Applications

  24. Ringdroid 1.1 Record and edit sounds and create ringtones directly on your Android phone. So Why pay when you can create your own ringtones for free? Ringdroid lets you edit any MP3 on your phone or record a new sound and turn it into a ringtone, alarm, or notification. The only graphical waveform editor you’ll find on a phone!ringdroid 30 Free Google Android Applications
  25. OI File manager – The OpenIntents file manager allows you to browse your SD card, create directories, rename, move, and delete files. It also acts as an extension to other applications to display “Open” and “Save” dialogs.OIFilemanager 30 Free Google Android Applications
  26. Thesaurus – Retrieve the synonym for every word. If available you will get antonyms, related terms, similar word and user suggestions too. Tap one of the results to start a quick new search for that term. As well it keeps a history list of your search terms.

    thesauruslg02 30 Free Google Android Applications

  27. WikiMobile Encyclopedia Being a walking encyclopedia is now at your fingertips. With WikiMobile, you carry 2+ million Wikipedia articles with you, including pictures. Faster and uses just a fraction of the network data vs. the Android browser. Download free for a limited time! mobilepedia 30 Free Google Android Applications
  28. Google Sky Map Google Sky Map: A star map for Android. Google Sky Map turns your Android-powered mobile phone into a dynamic window on the night sky. When you point your phone up you will see a map of the brightest stars, constellations, and planets in that part of the sky.

    googleskymap 30 Free Google Android Applications

  29. Meebo IM – Meebo is a free IM program that supports AIM, MSN, Yahoo, MySpace IM, Google Talk, Jabber and ICQ. You can also sign in using a Meebo account and your chat history will be saved forever, and can be accessed from anywhere by logging in at www.meebo.com.meebo thumb 30 Free Google Android Applications
  30. Ringo Lite – Ringtones Manager Ringo Lite is a fun way to set unique ringtones and SMS tones for each of your contacts. Now you can make your phone truly your own – set soppy tones for your loved-ones and party tones for your mates! Ringo Lite is a friendly place to manage all your phone’s tones quickly and easily, making ringtones fun again.ringtonelitemanager 30 Free Google Android Applications
  31. Mobile Banking (from Bank of America) – Check available balances, pay bills and transfer funds all on-the-go! Locate ATM and banking centers with GPS. No address input required. Download now, for one-touch access to your finances, whenever, wherever you are.mobilebankingboa 30 Free Google Android Applications
  32. StarTranslate Translator and dictionary. – Voice translation – Translate text – Translate SMS – Copy/Paste to any application – History – Swap translations – Get word definition in dictionary Many languages supported including : arabic, hebrew, thai, hindi. It is based on Google translate service. starttranslate thumb 30 Free Google Android Applications
  33. Sharetones for Android 1.1 beta Get ringtones on your phone based on songs you already own.Androidphonesharetone thumb 30 Free Google Android Applications
  34. ShopSavvy Scan barcodes with your phone”s camera and compare internet and local prices. Have a look over the article of Rob Jackson on Shop Savvy for Android: Defining The Vision . shopsavvylg01 thumb 30 Free Google Android Applications
  35. CraigslistChecker Want to find that rare vinyl to spin this weekend? Maybe a new car? Search craigSlist easily. Save your favorite searches and set them as alerts. Save listings and email them to your friend.

    craiglistchecker thumb 30 Free Google Android Applications

  36. Yellowbook.com Mobile Search – Yellowbook.com’s free mobile search app is easier and faster to use – and now features voice recognition! Just speak what you want to find like “Restaurants”, “Plumber”, “Florist”, or whatever and we’ll deliver local results to you. New Features: – Voice Search – Save to Contacts – Street View

    yellowbook 30 Free Google Android Applications

Updated: You can look into top 10 android applications lists.

Update on April 12, 2011: You can directly jump into the list of 15 best android applications that i use daily. (All the applications are installed on my Galaxy S and i have shared the list with the help of sharemyapps).

(Note: All the above described applications are sorted from Android Market, all the image and descriptions curtsy belongs to Google and respective developers sites.)