Apple's WWDC event has exploded in popularity in recent years, making it extremely difficult for most interested developers to secure tickets.
Not to worry, though, because session videos from WWDC 2014 are available for your viewing enjoyment via Apple's developer website. Per usual, the videos are free to download, a welcome change from years past when purchasing access to iPhone and Mac sessions would set you back as much as $499.
You can check out a listing of all the available session videos over here. There are about 107 in total and they cover any and everything iOS and OS X related. Naturally, there are a few session videos devoted exclusively to Swift, Apple's new programming language.
The videos can be downloaded or streamed via Safari running on OS X Lion or later. Interested users can also watch WWDC session videos via Apple's WWDC app.