DisplayLink is developed by a company of the same name. This app enables an iPad to be configured as the secondary monitor of a Windows PC. Install the appropriate DisplayLink Windows device driver software on the PC, and then establish a wireless connection from the iPad to the PC through the app. DisplayLink transmits frame buffers from the PC desktop to the iPad over Wi-Fi at a suitable refresh rate, although display of real-time content like streaming video tends to lag. Supports iPad only. Cost: Free.
Browse a database of more than 500,000 Wi-Fi wireless hotspots around the world to find the best locations to get online while traveling. The Wi-Fi Finder allows filtering by venue (such as hotels or restaurants), service provider, and either free or paid types of access. Apple generally doesn’t allow Wi-Fi stumbler apps that scan the vicinity for real time hotspot signals, but Wi-Fi Finder’s pre-loaded database is the next best thing. The App Store offers two versions of this app: One is specifically called “Free” but designed to support a smaller hotspot database, while the other is full-featured and usually also free nowadays. Cost: Free.
Traditional methods for sharing files between devices like Ethernet and USB aren’t available on iOS devices. Syncellence enables sharing wirelessly, using either Wi-Fi or Bluetooth. This app comes in both free and paid versions. The Free version allows peer-to-peer file sharing between an iOS device and other iOS, Mac, Windows or Linux computers, including encrypting data sent over the Wi-Fi link. The paid version of Syncellence adds synchronization support, the ability to automatically maintain matching sets of files between these devices, plus Facebook and Dropbox integration. Cost: Free, or USD $4.99.
Tethering two Apple devices legally requires that option be added to a person’s Internet data plan, and generally incurs an extra monthly fee. CoBrowser enables one of the basic usage models of tethering, shared Web browsing, without requiring actual tethering support or jailbreaking. Install the app on a device without Internet access (typically an iPad) and then link to the one browsing online (typically an iPhone), initiating the sharing process where copies of Web browser content are sent from one device to the other over a Bluetooth connection. Note CoBrowser does not support independent Web browsing from multiple devices. Rather, it mirrors the browsing session from one device onto the other in real time. Cost: USD $1.99-9.99.