diff --git a/.repo/pkgver/firefox-nightly-en-gb.sh b/.repo/pkgver/firefox-nightly-en-gb.sh
new file mode 100755
index 0000000..d65a857
--- /dev/null
+++ b/.repo/pkgver/firefox-nightly-en-gb.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e
+
+# check dependencies
+count=0
+for dependency in grep cut sort tail sed; do
+	if [ ! -x "$(command -v $dependency)" ]; then
+		echo "$dependency missing"
+		count=$((count+1))
+	fi
+done
+
+# exit script if any dependencies missing
+if [ $count -ne 0 ]; then
+	exit 1
+fi
+
+# options to pass to cURL, including custom user agent
+USER_AGENT="nightly-version-checker/1.0 george@rawlinson.net.nz"
+CURL_OPTS=(--silent --user-agent "$USER_AGENT")
+
+# package variables
+_name=firefox
+_channel=nightly
+_lang="en-GB"
+CARCH=x86_64
+_base_url="https://ftp.mozilla.org/pub/${_name}/${_channel}"
+
+_version=$(curl "${CURL_OPTS[@]}" ${_base_url}/latest-mozilla-central-l10n/ | grep "${_lang}.linux-${CARCH}.checksums" | sort | tail -n 1 | sed "s/^.*>firefox-//; s/\.${_lang}.*//")
+_build_id_raw="$(curl "${CURL_OPTS[@]}" "${_base_url}/latest-mozilla-central-l10n/${_name}-${_version}.${_lang}.linux-${CARCH}.checksums" | grep '.partial.mar' | cut -d' ' -f4 | grep -E -o '[[:digit:]]{14}' | sort | tail -n1)"
+declare -A _build_id
+_build_id=(
+	[year]="${_build_id_raw:0:4}"
+	[month]="${_build_id_raw:4:2}"
+	[day]="${_build_id_raw:6:2}"
+	[hour]="${_build_id_raw:8:2}"
+	[min]="${_build_id_raw:10:2}"
+	[sec]="${_build_id_raw:12:2}"
+	[date]="${_build_id_raw:0:8}"
+	[time]="${_build_id_raw:8:6}"
+)
+
+echo "${_version}.${_build_id[date]}.${_build_id[time]}"
+
+exit 0
diff --git a/.repo/pkgver/html-xml-utils.sh b/.repo/pkgver/html-xml-utils.sh
new file mode 100755
index 0000000..323705d
--- /dev/null
+++ b/.repo/pkgver/html-xml-utils.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+set -e
+
+# check dependencies
+count=0
+for dependency in hxnormalize hxselect grep sed sort tail; do
+	if [ ! -x "$(command -v $dependency)" ]; then
+		echo "$dependency missing"
+		count=$((count+1))
+	fi
+done
+
+# exit script if any dependencies missing
+if [ $count -ne 0 ]; then
+	exit 1
+fi
+
+# upstream URL
+UPSTREAM_URL="https://www.w3.org/Tools/HTML-XML-utils/"
+
+# options to pass to cURL, including custom user agent
+USER_AGENT="hxu-version-checker/1.0 george@rawlinson.net.nz"
+CURL_OPTS=(--silent --user-agent "$USER_AGENT")
+
+curl "${CURL_OPTS[@]}" "$UPSTREAM_URL" | \
+	hxnormalize -x | \
+	hxselect -c 'a' -s '\n' | \
+	grep "html-xml-utils" | \
+	sed -e "s/html-xml-utils-//g" -e "s/.tar.gz//g" | \
+	sort -n | \
+	tail -n 1
+
+exit 0
diff --git a/.repo/pkgver/samhain.sh b/.repo/pkgver/samhain.sh
new file mode 100755
index 0000000..a74ffd2
--- /dev/null
+++ b/.repo/pkgver/samhain.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+set -e
+
+# check dependencies
+count=0
+for dependency in hxnormalize hxselect grep sed sort tail; do
+	if [ ! -x "$(command -v $dependency)" ]; then
+		echo "$dependency missing"
+		count=$((count+1))
+	fi
+done
+
+# exit script if any dependencies missing
+if [ $count -ne 0 ]; then
+	exit 1
+fi
+
+# upstream URL
+UPSTREAM_URL="https://www.la-samhna.de/samhain/s_download.html"
+
+# options to pass to cURL, including custom user agent
+USER_AGENT="samhain-version-checker/1.0 george@rawlinson.net.nz"
+CURL_OPTS=(--silent --user-agent "$USER_AGENT")
+
+curl "${CURL_OPTS[@]}" "$UPSTREAM_URL" | \
+	hxnormalize -x | \
+	hxselect -c 'div.table-wrapper ' 'td' | \
+	head -n 1 | \
+	sed -e "s/Version //" -e "s/<.*//"
+exit 0
diff --git a/.repo/pkgver/sendmail.sh b/.repo/pkgver/sendmail.sh
new file mode 100755
index 0000000..9078be8
--- /dev/null
+++ b/.repo/pkgver/sendmail.sh
@@ -0,0 +1,27 @@
+#!/usr/bin/bash
+set -e
+
+# check dependencies
+count=0
+for dependency in curl tr cut grep sed sort tail; do
+	if [ ! -x "$(command -v $dependency)" ]; then
+		echo "$dependency missing"
+		count=$((count+1))
+	fi
+done
+
+# exit script if any dependencies missing
+if [ $count -ne 0 ]; then
+	exit 1
+fi
+
+# upstream URL
+UPSTREAM_URL="ftp://ftp.sendmail.org/pub/sendmail/"
+
+# options to pass to cURL, including custom user agent
+USER_AGENT="sendmail-version-checker/1.0 george@rawlinson.net.nz"
+CURL_OPTS=(--ftp-pasv --silent --user-agent "$USER_AGENT")
+
+curl "${CURL_OPTS[@]}" "$UPSTREAM_URL" | tr -s ' ' | cut -d ' ' -f 9 | grep -E "sendmail\..+\.tar\.gz\.sig$" | sed -e 's/^sendmail\.//' -e 's/\.tar\.gz\.sig$//' | sort -n | tail -n 1
+
+exit 0