How to rename a file in Sublime Text 3?
I recently added the functionality to AdvancedNewFile. It should rename the currently opened view, assuming you have the appropriate permissions at the source and destination locations. If you try it and run into an issue though, please create an issue on the github page.
There's the SideBarEnhancements plugin that does this.
You can find it on GitHub here: https://github.com/titoBouzout/SideBarEnhancements/tree/st3
There's way too many people suggesting plugins for something simple and built into Sublime's Package Manager.
In Sublime 3 there is a built in command within Package Manager. So:
Shift+(Ctrl|Cmd)+p -> Rename File
Here is a package for Sublime Text 3 I wrote:
https://github.com/brianlow/FileRename