diff --git a/bin/markdown-format-wdiff b/bin/markdown-format-wdiff
deleted file mode 100644
index 28d045e..0000000
--- a/bin/markdown-format-wdiff
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env bash
-# Markdown-wdiff -- format diff of Markdown files with decoration
-# Usage:
-#     wdiff old.md new.md | markdown-format-wdiff
-#     git diff --word-diff origin/master -- README.md docs/tutorial/README.md | markdown-format-wdiff
-#
-# Author: Jaeho Shin <netj@cs.stanford.edu>
-# Created: 2013-11-18
-set -eu
-
-# word diff the given unified diff as input, and format it by hunks
-sed '
-# format ins/del of words
-s|\[-|<del class="del">|g; s|-]|</del>|g
-s|{+|<ins class="ins">|g; s|+}|</ins>|g
-'
-
-# attach a small stylesheet
-#echo '
-#<style>
-#    .del,.ins{ display: inline-block; margin-left: 0.5ex; }
-#    .del     { background-color: #fcc; }
-#         .ins{ background-color: #cfc; }
-#</style>
-#'
diff --git a/bin/markdown-git-changes b/bin/markdown-git-changes
deleted file mode 100644
index 0d8d92c..0000000
--- a/bin/markdown-git-changes
+++ /dev/null
@@ -1,108 +0,0 @@
-#!/usr/bin/env bash
-# Summarize commit history and diff of Markdown files in the current Git repo
-# Usage:
-#     markdown-git-changes [COMMIT [MARKDOWN_FILE]...]
-# 
-# You can specify COMMIT as `--' to automatically see changes of given files
-# against the upstream branch, HEAD^, or HEAD.
-#
-# Author: Jaeho Shin <netj@cs.stanford.edu>
-# Created: 2013-11-18
-set -eu
-
-Here=$(dirname "$0")
-PATH="$Here:$PATH" # add this directory to PATH for markdown-format-wdiff
-
-# TODO passthru any diff options
-
-# how to find markdown files in the current git repo
-files=()
-find_markdown_files() {
-    local IFS=$'\n'
-    set -- $(git ls-files | grep '\.\(md\|mkd\|markdn\|markdown\)$')
-    files=("$@")
-}
-
-# diff against given commit, or upstream branch, or HEAD^ if no local changes, or HEAD
-since=--; [ $# -eq 0 ] || { since=$1; shift; }
-if [ x"$since" = x"--" ]; then
-    find_markdown_files
-    since=`
-        git rev-parse --abbrev-ref HEAD@{upstream} 2>/dev/null ||
-        case $(git status --porcelain --untracked-files=no "${files[@]}" | wc -l) in
-            0) echo 'HEAD^' ;;
-            *) echo 'HEAD'
-        esac
-    `
-fi
-# unless list of files are given, find Markdown documents in the Git repo
-if [ $# -gt 0 ]; then
-    files=("$@")
-elif [ ${#files[@]} -eq 0 ]; then
-    find_markdown_files
-fi
-
-# make sure ${files[@]} isn't empty
-[ ${#files[@]} -gt 0 ] || files+=(.)
-
-
-# summarize commit history
-{
-    echo "\$ git log --oneline "$since"..HEAD $*"
-    git log --oneline "$since"..HEAD "${files[@]}"
-} |
-sed 's/^/    /'
-echo
-
-# and embed the overall word diff
-git diff ${GIT_DIFF_OPTS:-} --word-diff --patch-with-stat \
-    --minimal --patience \
-    "$since" -- "${files[@]}" |
-sed '
-    # format prologue
-    1,/^diff /{
-        /^diff/! s/^/    /
-    }
-
-    # format file headers
-    /^diff /,/^+++ /{
-        /^diff /{
-            s|^diff .* \([^/]/\)\(.*\)|<div class="file-start"><code>\2</code></div>|
-            a\
-    \
-
-        }
-        /^<div class="file-start">/! s/^/    /
-    }
-
-    # format hunks
-    /^@@ -.* +.* @@/{
-        s| @@.*| @@|
-        s|^|<div class="hunk-start"><code>|
-        s|$|</code></div>|
-    }
-' |
-markdown-format-wdiff
-echo '
-<style>
-    pre:first-of-type { width: 78%; margin-left: auto; margin-right: auto; }
-    .file-start + p + pre,
-    .file-start + pre { margin-left: 61.8%; }
-    .file-start,
-    .hunk-start{ text-align: right; }
-
-    .file-start code{ font-size: inherit; }
-
-    .file-start/*:not(:first-of-type)*/{
-        font-size: 150%;
-        margin-top: 23.6%;
-        border-bottom: 1ex solid #ccc;
-        padding-bottom: 1ex;
-    }
-    .hunk-start{
-        margin-top: 2ex;
-        border-bottom: 1ex dashed #ccc;
-        padding-bottom: 1ex;
-    }
-</style>
-'
diff --git a/bin/wdiff b/bin/wdiff
deleted file mode 120000
index 0845663..0000000
--- a/bin/wdiff
+++ /dev/null
@@ -1 +0,0 @@
-/usr/bin/wdiff
\ No newline at end of file