The following movies and TV shows are part of the Marvel Cinematic Universe (Earth 19999). They share a common timeline.
*As of 2015, a special deal was struck between Sony and Marvel allowing Spider-Man to appear within the MCU, and Marvel will be involved with the production of solo movies including the new Spider-Man movie.
The following existing movies/franchises are NOT part of the Marvel Cinematic Universe, as their movie rights are NOT owned by Marvel and thus not allowed to crossover without special agreements. Each separate universe has its own timeline (in the case of the X-Men movies, multiple timelines).
The new Fantastic Four movie is being rebooted/made by Fox Studios and will likely receive a new universe designation.
Since rights for Ghost Rider, Punisher, and Daredevil have now reverted back to Marvel, any new movies featuring them will likely be folded into the MCU (Earth 19999).