You are downloading the Tamil Visai XAP file v126.96.36.199 for Windows Phone. Tamil Visai is a free and useful Productivity app: It is a Tamil typing keyboard application. Copy the typed text to the clipboard and use it anywhere. Please check the Help for English to Tamil ... You can now download the offline XAP file to install & try it.
Download Locations for Tamil Visai 188.8.131.52 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Tamil Visai XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.