Assuming you have managed to find a wireless card that is working well with your Linux distribution, or perhaps you just settled for a hack-n’-hope solution with NDISWrapper, you need to settle on an application that you can use to connect to your wireless network.
For vanilla GNOME and KDE-based installations, you are provided solutions out-of-the-box. The problem is - they do not always work for everyone. Because of this, I will be highlighting every option I can think of today.
KnetworkManager: If you are using a distro with a KDE desktop environment, then this is likely the connection manager that you were provided with by default. KnetworkManager is generally the best choice for KDE users looking to get their connection up and running without a lot of hassle.