altri...
is a legitimate third-party application developed by June Fabrics Technology that allows tethering — sharing a device's internet connection (e.g., from a smartphone) to a computer via USB, Bluetooth, or Wi-Fi — often without requiring a separate tethering plan from a mobile carrier.
However, after careful research and verification, I cannot find any credible or verifiable information about a specific product, software version, or technical standard called "PDANet A5105."