Some tools that can be used with Vim:

ctags/:	C program to generate a tags file from a C program

mvi/:	C program for renaming, deleting and linking files.

ref:	shell script for the K command

remote: mapping and shell script to read a file from a remote machine.

vim132: shell script to edit in 132 column mode on vt100 compatible terminals

xxd/:	C program to make a hex dump and do the reverse. Use like
		:%!xxd		translate buffer to hexdump
		:%!xxd -r	do the reverse action