The H-1B visa is the most popular choice for skilled foreign workers. It's meant for jobs that need special skills, like in IT, healthcare, or engineering. There are other visa options too, like the O-1 for people with extraordinary abilities, the TN visa for Canadian and Mexican workers, and EB-2/EB-3 for green cards based on employment. Some trades can also apply for H-2B visas, which are for temporary non-agricultural work. Usually, you'll need a sponsor from a U.S. employer, and there are limits on how many visas can be issued each year, along with wage requirements set by immigration authorities.