Install non-marketplace apps


The Android Marketplace is a great repository for applications but there are

also some worthwhile alternatives to try out. The only hurdle is that by default

Android refuses to install apps (a.k.a. APK files) that have not been sourced
from

the Marketplace. To fix this press Menu > Settings > Applications and tick the

box next to Unknown Sources. This will allow the installation of apk from other

app sources such as GetJar.