Mac clipboard manipulation scripts I use the most. These all live in my ~/bin/ directory

pbcut

#!/bin/bash

# Useful for when you want to trim off leading spaces from clipboard text
# Say you grab a chunk of code from a markdown document and want to remove
# the four spaces at the front:
# 
#     pbcut -c 5-

pbpaste | cut "$@" | pbcopy
pbpaste

pbindent

#!/bin/bash

# Useful for when you want to add spaces in front of some text.  Perhaps
# you want something to appear as code in a Markdown document, just run
# pbindent twice.  Indented text also looks nice in emails to make something
# appear as a quote of a document or contents of a file.

pbpaste | perl -pe 's/^/  /' | pbcopy

pbprefix

#!/bin/bash

# Will prepend the given prefix onto each line of the clipboard.
# Very useful for when you have some text you want to turn into
# a bulleted list.
#
#     pbprefix " - "
#
# Maybe you want some text to appear as quoted in an email:
#
#     pbprefix "> "
#

PREFIX="${1?Specify a prefix such as a dash or bullet}"
pbpaste | perl -pe "s/^/$PREFIX/" | pbcopy

pbsort

#!/bin/bash

# This clipboard text would be better if it was sorted, right?
# Options can be passed to the sort command, so for example to
# sort the clipboard text numerically:
#
#     pbsort -n
#

pbpaste | sort "$@" | pbcopy

pbwash

#!/bin/bash

# For when you don't want the fonts, colors and other fancy 
# formatting information.  Yes, there are hot keys for that, but
# I live in the terminal anyway and have all these other commands
# so why not.

pbpaste | pbcopy

pbwrap

#!/bin/bash

# Would it be nice if this text was word-wrapped?  Sure,
# we can paste it into emacs, wrap it, then copy it back,
# but perhaps this is a bit quicker.
#
#     pbwrap
#     pbwrap 77
#

WIDTH="${1:-90}"
echo $(pbpaste) | fold -w "$WIDTH" -s | pbcopy