There are a lot of applications which do not arrive to Android market but still those are released by developers in APK format and called off-market apps.You are still able to download and install these apps with some simple steps.Follow the instructions to install a non-market app on Android phone after the break.
Install Off-market APK Apps on Android Phone
Step 1 Download your desired off-market APK app on your computer.
Step 2 Open the URL www.apkinstall.com, and then click on Browse files button and upload your downloaded APK app.
Step 3 On completion of upload process the website will create a QR code for your APK app. So, scan that QR code through QR code scanner on your Android device.
Note: Scan the code after 15 minutes of uploading, otherwise download will fail.
Step 4 Then click on Open browser button, so your app will get downloaded to your Android phone.
Step 5 Now, tap on your downloaded app to install it and tap on Install button to complete the process.
You are done now, you have installed a non-market APK app on your Android phone.