Auto save backup file for unsaved buffer?

Is there any plugin that can auto save backup file to specified directory before saving a buffer to file (EmEditor has this great feature), or any option to keep swap file after normal exit?

Currently, I can get auto saved swap or backup file only after vim crash or saving to disk.

--
--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php
 
---
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vim_use+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.