Spin-a-Wind is a handy application to quickly calculate your crosswind component based on the wind speed and direction and given heading. You can set personal wind warnings and maximum settings based on your comfort level and POH for your airplane. This is a pretty cool app. Ultralighers, GA pilots or Light Sport pilot? This is an application for everyone.
Foreflight is another popular pre and inflight tool. If you have a mobile phone or tablet that you use in-flight, these Foreflight or Wing X Pro are powerful tools.