Wikipedia:Google Chrome Apps
Google Chrome Apps are web applications that run on the Google Chrome web browser. Chrome apps can be obtained from the Chrome Web Store where apps, extensions, and themes can be installed or bought. There are two types of apps, hosted and packaged, which have different locations of their executable and are targeted at different use cases.
Chrome apps can be hosted or packaged. Hosted apps have their background web pages on a remote server and the app acts like a bookmark or shortcut.