diff --git a/bin/++ b/bin/++
new file mode 100755
index 0000000..e6952b5
--- /dev/null
+++ b/bin/++
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+add $1 1
diff --git a/bin/abs b/bin/abs
new file mode 100755
index 0000000..f4d77b4
--- /dev/null
+++ b/bin/abs
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+! eq $# 1 \
+	&& printf "Usage: %b [integer]\n" "$0" >/dev/stderr \
+	&& exit 1
+
+! stris int "$1" \
+	&& printf "%b: %b: Not an integer\n" "$0" "$1" >/dev/stderr \
+	&& exit 1
+
+lt $1 0 \
+	&& printf "%b\n" $(multiply $1 -1) \
+	|| printf "%b\n" $1
+
+exit 0
diff --git a/bin/bak b/bin/bak
new file mode 100755
index 0000000..8ea90ec
--- /dev/null
+++ b/bin/bak
@@ -0,0 +1,24 @@
+#!/bin/sh
+set -e
+
+argv0="$0" [ -n "$SUFFIX" ] \
+	|| SUFFIX=".bak"
+
+shift 1
+
+while [ -n "$0" ]; do
+	if [ -e "$0$SUFFIX" ] && ! [ -d "$0$SUFFIX" ]; then
+		"$argv0" "$0$SUFFIX" \
+			|| exit $?
+	elif [ -d "$0$SUFFIX" ]; then
+		printf "%s: %s: Cannot bak directories.\n" "$argv0" "$0" 1>&2
+		exit 64 # sysexits(3) EX_USAGE
+	elif ! [ -e "$0" ]; then
+		printf "%s: %s: File does not exit.\n" "$argv0" "$0" 1>&2
+		exit 64
+	fi
+
+	mv "$0" "$0$SUFFIX" \
+		|| exit $?
+	shift 1
+done
diff --git a/bin/calculate b/bin/calculate
new file mode 100755
index 0000000..caa5c38
Binary files /dev/null and b/bin/calculate differ
diff --git a/bin/cat b/bin/cat
new file mode 100755
index 0000000..a96140e
--- /dev/null
+++ b/bin/cat
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+alias dd="dd bs=1 2>/dev/null"
+
+if [ -z "$1" ]; then
+	dd </dev/stdin
+	exit 0
+fi
+
+while [ -n "$1" ]; do
+	dd <"$1"
+	shift 1
+done
diff --git a/bin/cscript b/bin/cscript
new file mode 100755
index 0000000..d3678d1
--- /dev/null
+++ b/bin/cscript
@@ -0,0 +1,14 @@
+#!/bin/sh
+set -e
+
+TMPDIR="/tmp/cscript/"
+TMPSRC="$TMPDIR/script.c"
+TMPOUT="$TMPDIR/a.out"
+
+[ -d "$TMPDIR" ] || mkdir -p "$TMPDIR"
+
+printf "%s" "$1" >"$TMPSRC"
+
+cc -o "$TMPOUT" "$TMPSRC"
+
+dd bs=1 2>/dev/null | "$TMPOUT"
diff --git a/bin/head b/bin/head
new file mode 100755
index 0000000..84b6540
--- /dev/null
+++ b/bin/head
@@ -0,0 +1,61 @@
+#!/bin/sh
+
+length=10 # default length
+
+# core [input] [output] [length]
+core() {
+	sed $3q <"$1" >"$2"
+}
+
+usage() {
+	printf "Usage: %b [-h] [-n number]\n" "$1"
+	exit 1
+}
+
+argc=$#
+argv0="$0"
+output="/dev/stdout"
+
+while getopts 'hn:' c; do
+	case $c in
+	(h) usage "$0";;
+	(n)
+		stris uint "$OPTARG" \
+			&& length=$OPTARG \
+			|| usage "$argv0"
+		;;
+	(:)
+		printf "%b: \"-$OPTARG\" requires an argument (number)\n" "$argv0" >/dev/stderr
+		exit 1;;
+	(?)
+		stris uint $OPTOPT >/dev/null \
+			&& printf "%b: This program doesn't support -[number] arguments as they're not POSIX\n" "$argv0" >/dev/stderr \
+			|| usage "$argv0"
+		exit 1;;
+	esac
+done
+
+if eq $OPTIND $(add $argc 1); then # no file specified, assume stdin
+	core /dev/stdin "$output" $length
+	exit 0
+fi
+
+shift $OPTIND
+temp0="$0"
+
+while true; do
+	! [ -e "$0" ] \
+		&& printf "%b: %b: File does not exist\n" "$argv0" "$0" >/dev/stderr \
+		&& exit 1
+
+	[ -n "$1" ] && ! streq "$0" "$temp0" \
+		&& printf "\n" >"$output"
+	[ -n "$1" ] \
+		&& printf "==> %b <==\n" "$0" >"$output"
+
+	core "$0" "$output" $length
+
+	[ -n "$1" ] && shift 1 || break
+done
+
+exit 0
diff --git a/bin/id b/bin/id
new file mode 100755
index 0000000..ac53031
Binary files /dev/null and b/bin/id differ
diff --git a/bin/levenshtein b/bin/levenshtein
new file mode 100755
index 0000000..24b193a
Binary files /dev/null and b/bin/levenshtein differ
diff --git a/bin/man b/bin/man
new file mode 100755
index 0000000..3f7b62d
--- /dev/null
+++ b/bin/man
@@ -0,0 +1,87 @@
+#!/bin/sh
+
+argv0="$0"
+
+die() { printf "$*" >/dev/stderr && exit 1; }
+
+# A lot of these break convention when recording errors because this tries to
+# imitate other implementations.
+[ -n "$1" ] || die "What manual page do you want?\nFor example, try 'man man'.\n"
+
+[ -n "$LANG" ] || LANG="C"
+
+[ -n "$MANPATH" ] || MANPATH="/usr/share/man"
+[ -d "$MANPATH" ] || die "$0: \$MANPATH: $MANPATH: Does not exist\n"
+[ -n "$MANSECTIONS" ] \
+	&& default_mansections="$MANSECTIONS" \
+	|| default_mansections="1nl830254967" 
+[ -d "$MANPATH"/"$LANG" ] \
+	&& MANDIR="$MANPATH/$LANG" \
+	|| MANDIR="$MANPATH"
+
+if [ -z "$PAGER" ]; then
+	for prog in $(printf "
+less
+more
+cat
+dd
+	"); do
+		if which "$prog" >/dev/null 2>&1; then
+			PAGER="$prog"
+			break
+		fi
+	done
+fi
+
+man() {
+	eq $# 2 || die "$argv0: man() called with $# arguments. Expected 2. This is a programmer error\n"
+	MANSECTIONS="$1"
+	NAME="$2"
+
+	# the way manpages are laid out SUCKS
+	# so, yeah, each man section is one character. which means it's totally
+	# bueno to just iterate over the string like this. but $MANDIR/man1 can
+	# have both man.1.gz AND man.1p.gz. ARGH!!!!
+	for SECTION in $(printf "$MANSECTIONS" | sed 's/\(.\)/\1\n/g'); do
+		PAGE="$(find "$MANDIR/man$SECTION" -type f 2>/dev/null | grep "\/$NAME\.\|\/$NAME$" | sed q)"
+		[ -z "$PAGE" ] || break
+	done
+
+	! [ -n "$PAGE" ] \
+		&& printf "No manual entry for $NAME\n" \
+		&& return 1
+
+	case "$(file -bir --no-buffer "$PAGE")" in
+		("text/"*)
+			COMMAND="cat" ;;
+		("application/gzip"*)
+			COMMAND="zcat" ;;
+		(*)
+			die "$argv0: $PAGE: Unknown file type.\n" ;;
+	esac
+
+	$COMMAND "$PAGE" | nroff -man | $PAGER
+}
+
+# this seems to be what the popular man does
+# so like `man foo -k bar` will show the manpages for foo, -k, and bar
+# expected behavior imo would be manpage for foo, then gist for bar
+# but let's not break things
+if streq "$1" "-k"; then # -k
+	printf "Not yet implemented\n" && exit 1
+else # not -k
+	while gt $# 0; do
+		if eq $(fdivide $# 2) 0 && gt 1 $# || ! stris int "$1"; then
+			MANSECTIONS="$default_mansections"
+			NAME="$1"
+			SHIFTING=1
+		elif gt 1 $(fdivide $# 2); then
+			MANSECTIONS="$1"
+			NAME="$2"
+			SHIFTING=2
+		else exit 0 # no more args
+		fi
+		man "$MANSECTIONS" "$NAME"
+		shift $SHIFTING
+	done
+fi
diff --git a/bin/mod b/bin/mod
new file mode 100755
index 0000000..bbb63e4
--- /dev/null
+++ b/bin/mod
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+! eq $# 2 && printf "Usage: $0 [dividend] [divisor]\n" >/dev/stderr && exit 1
+
+! stris int "$1" && printf "$0: $1: Not an integer\n" >/dev/stderr && exit 1
+! stris int "$2" && printf "$0: $2: Not an integer\n" >/dev/stderr && exit 1
+
+dividend=$1
+divisor=$2
+
+# (% a b) == (- a (* b (// a b)))
+printf "%b\n" $(subtract $dividend $(multiply $divisor $(fdivide $dividend $divisor)))
+exit 0
diff --git a/bin/pow b/bin/pow
new file mode 100755
index 0000000..3158f07
--- /dev/null
+++ b/bin/pow
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+! eq $# 2 && printf "Usage: $0 [base] [exponent]\n" >/dev/stderr && exit 1
+
+! stris int "$1" && printf -- "%b: %b: Not an integer\n" "$0" "$1" >/dev/stderr && exit 1
+! stris int "$2" && printf -- "%b: %b: Not an integer\n" "$0" "$2" >/dev/stderr && exit 1
+
+base=$1
+exponent=$2
+
+result=1
+
+while gt $exponent 0; do
+	result=$(multiply $result $base)
+	exponent=$(-- $exponent)
+done
+
+if ! eq $result $(abs $result) && eq $base $(abs $base); then
+	printf "$0: Result is unexpectedly negative, possible integer overflow\n" >/dev/stderr && exit 1
+elif eq $result 0 && ! eq $base 0; then
+	printf "$0: Result is unexpectedly zero, possible integer overflow\n" >/dev/stderr && exit 1
+else
+	printf "%b\n" $result
+fi
+
+exit 0
diff --git a/bin/runlength b/bin/runlength
new file mode 100755
index 0000000..9e4c0c9
Binary files /dev/null and b/bin/runlength differ
diff --git a/bin/seq b/bin/seq
new file mode 100755
index 0000000..3b4ab1d
--- /dev/null
+++ b/bin/seq
@@ -0,0 +1,44 @@
+#!/bin/sh
+
+argv0="$0"
+
+nai() {
+	printf "$argv0: $1: Not an integer\n"
+	exit 1
+}
+
+usage() {
+	printf "Usage:\n \
+	$argv0 [last]
+	$argv0 [first] [last]
+	$argv0 [first] [increment] [last]\n" \
+		>/dev/stderr
+	exit 1
+}
+
+[ -n "$1" ] || usage
+if [ -n "$3" ]; then
+	stris int "$3" \
+		|| nai "$3" \
+		&& last=$3
+	stris int "$2" \
+		|| nai "$2" \
+		&& increment=$2
+	stris int "$1" \
+		|| nai "$1" \
+		&& first=$1
+elif [ -n "$2" ]; then
+	stris int "$2" \
+		|| nai "$2" \
+		&& last=$2
+	stris int "$1" \
+		|| nai "$1" \
+		&& first=$1
+	increment=1
+else
+	stris int "$1" \
+		|| nai "$1" \
+		&& last=$1
+	first=1
+	increment=1
+fi
diff --git a/bin/subtract b/bin/subtract
new file mode 100755
index 0000000..e0d4b45
--- /dev/null
+++ b/bin/subtract
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# science speak from wikipedia
+! eq $# 2 && printf "Usage: $0 [minuend] [subtrahend]\n" >/dev/stderr && exit 1
+
+! stris int "$1" && printf "$0: $1: Not an integer\n" >/dev/stderr && exit 1
+! stris int "$2" && printf "$0: $2: Not an integer\n" >/dev/stderr && exit 1
+
+minuend=$1
+subtrahend=$2
+
+# (- a b) == (+ a (* b -1))
+printf "%b\n" $(add $minuend $(multiply $subtrahend -1))
+exit 0
diff --git a/bin/true b/bin/true
new file mode 100755
index 0000000..e69de29
diff --git a/bin/uwu b/bin/uwu
new file mode 100755
index 0000000..2fc7f0f
--- /dev/null
+++ b/bin/uwu
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# Simple script of substitutions to uwuify English.
+# Not a great use of disk...
+dd 2>/dev/null \
+| sed \
+	-e 's/l/w/g' \
+	-e 's/r/w/g' \
+	-e 's/smaww/smol/g' \
+	-e 's/wove/wuv/g'