How to Install Non-Market Apps

Android applications are packaged in .apk files. If you have a web page that links to the .apk you can tap the link to download and install it (you can also install a .apk from your sdcard by browsing to and tapping on it using a file manager).

Since files distributed in this method have not been “blessed” by the keepers of the Market you will be presented with an “Install blocked” dialog box. You can Cancel, or continue by tapping the Settings button.

On the Application Settings screen you’ll see an item titled “Unknown sources” which allows you to install non-Market applications. Once you tap the checkbox you will be able to install non-Market apps. You’ll need to restart the installation process for that app now.

WidgetLocker & Ripple Lock Apps

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You can download free version of Ripple Lock from android Marker Here

And you can download WidgetLocker 2.1.0 APK file Here

If you don't know how to enable installation of apk file check this blog later title will be
How to Install Non-Market Apps