The reload.vim plug-in automatically reloads various types of Vim scripts as they're being edited in Vim to give you instant feedback on the changes you make. For example while writing a Vim syntax script you can open a split window of the relevant file type and every time you :update your syntax script, reload.vim will refresh the syntax highlighting in the split window. For more information about the plug-in please refer to its homepage or the project page on GitHub:
If you have questions, bug reports, suggestions, etc. the author can be contacted at firstname.lastname@example.org. If you like this plug-in please vote for it below!
Please note that the vim-reload plug-in requires my vim-misc plug-in which is separately distributed (see vimscript #4597).
Unzip the most recent ZIP archives of the vim-reload and vim-misc plug-ins inside your Vim profile directory (usually this is ~/.vim on UNIX and %USERPROFILE%\vimfiles on Windows), restart Vim and execute the command :helptags ~/.vim/doc (use :helptags ~\vimfiles\doc instead on Windows).
Now try it out: Edit any Vim script that's already loaded and check that the script is reloaded when you save it (the reload.vim plug-in will print a message to confirm when a script is reloaded).
If you prefer you can also use Pathogen, Vundle or a similar tool to install & update the vim-reload and vim-misc plug-ins using a local clone of the git repository.