vim - Plugin for browse the functions and variables in Gvim -

Can someone recommend a good plugin to browse variables of functions and source files in Gvim?

Best Regards,

is one of the most popular ones. It provides a simple and intuitive way to automatically update the list of tags in a buffer. There are also less popular options here, but I recommend trying the tag list first. Till now powerful use is simple, and probably fits your demands.