Awesome Drop is an online service which uses HTML5 features to let you drag and drop files from your computer to your Android phone over the web. This is really an easy way to transfer files from computer to phone using just a web browser on any OS. No need to connect any cable or memory card for transferring data.
This service is free and No account is required. It works over Wi-Fi and 3G but Wi-Fi is recommended. All the files are stored in the "drop" folder on storage card of phone.
To use it, you firstly need to Download and install the Awesome Drop on your phone. Then make sure Wi-Fi is On and both computer and phone are connected over the same network. Follow the demo video below to see the process in action:
Awesome Drop via [LifeHacker]