diff --git a/README.rst b/README.rst
index 18ad65c8b2..5c58595361 100644
--- a/README.rst
+++ b/README.rst
@@ -503,3 +503,26 @@ changes, and push the patch to gerrit.
 ::
 
   tox -e venv -- propose-final-releases newton ocata
+
+tools/list_unreleased_changes.sh
+--------------------------------
+
+Given a branch and one or more repositories, produce a list of the
+changes in those repositories since their last tag on that
+branch. This is useful for deciding if a project needs to prepare a
+release, and for predicting what the next release version should be by
+looking at the commit logs.
+
+::
+
+  ./tools/list_unreleased_changes.sh master openstack/oslo.config
+
+Print the list of changes in ``openstack/oslo.config`` along the
+master branch.
+
+::
+
+  ./tools/list_unreleased_changes.sh stable/kilo $(list-deliverables --repos --team Oslo)
+
+Print the list of changes in the ``stable/kilo`` branch of all Oslo
+libraries.
diff --git a/tools/functions b/tools/functions
new file mode 100644
index 0000000000..6f34c7633e
--- /dev/null
+++ b/tools/functions
@@ -0,0 +1,119 @@
+#!/bin/bash
+#
+# Shared functions for shell scripts
+#
+
+# Make sure custom grep options don't get in the way
+unset GREP_OPTIONS
+
+
+function lp_project_to_repo {
+    typeset proj="$1"
+
+    if [[ $proj == python-*client* ]]; then
+        echo $proj
+    elif [[ $proj == glance-store ]]; then
+        echo glance_store
+    elif [[ $proj == django-openstack-auth ]]; then
+        echo django_openstack_auth
+    else
+        # Some of the repository names don't match the launchpad names, e.g.
+        # python-stevedore and python-cliff.
+        echo $proj | sed -e 's|^python-||'
+    fi
+}
+
+function title {
+    echo
+    if [ -t 1 ]; then
+        echo "$(tput bold)$(tput setaf 1)[ $1 ]$(tput sgr0)"
+    else
+        echo "[ $1 ]"
+    fi
+}
+
+
+function _cleanup_tmp {
+    rm -rf $MYTMPDIR
+    return 0
+}
+
+
+function setup_temp_space {
+    MYTMPDIR=`mktemp -d _tmp-${1}-XXX`
+    mkdir -p "$MYTMPDIR"
+    trap _cleanup_tmp EXIT
+    cd "$MYTMPDIR"
+    # NOTE(dhellmann): On some platforms mktemp returns a short name
+    # instead of a full path, so expand the full path by looking at
+    # where we ended up after the cd operation.
+    MYTMPDIR="$(pwd)"
+}
+
+
+
+function get_last_tag {
+    # Print the most recent tag for a ref. If no ref is specified, the
+    # currently checked out branch is examined.
+    local ref="$1"
+    if ! git describe --abbrev=0 --first-parent ${ref} >/dev/null 2>&1; then
+        echo ""
+    else
+        git describe --abbrev=0 --first-parent ${ref}
+    fi
+}
+
+
+function update_gitreview {
+    typeset branch="$1"
+
+    title "Updating .gitreview"
+    git checkout $branch
+    # Remove a trailing newline, if present, to ensure consistent
+    # formatting when we add the defaultbranch line next.
+    typeset grcontents="$(echo -n "$(cat .gitreview | grep -v defaultbranch)")
+defaultbranch=$branch"
+    echo "$grcontents" > .gitreview
+    git add .gitreview
+    git commit -m "Update .gitreview for $branch"
+    git show
+    local shortbranch=$(basename $branch)
+    git review -t "create-${shortbranch}"
+}
+
+
+function update_upper_constraints {
+    typeset branch="$1"
+    typeset uc_server='git.openstack.org'
+    typeset uc_path='cgit/openstack/requirements/plain/upper-constraints.txt'
+    typeset uc_url="https://${uc_server}/${uc_path}?h=${branch}"
+
+    title "Updating tox.ini for upper-constraints"
+    git checkout $branch
+    sed -i~ -e "s,-c.*{\(env:UPPER_CONSTRAINTS_FILE\)[^ ]*},-c{\1:$uc_url}," tox.ini
+    if ! git diff --exit-code >/dev/null 2>&1 ; then
+        git add tox.ini
+        git commit -m "Update UPPER_CONSTRAINTS_FILE for $branch"
+        git show
+        local shortbranch=$(basename $branch)
+        git review -t "create-${shortbranch}"
+    fi
+}
+
+
+function clone_repo {
+    typeset repo="$1"
+    typeset branch="$2"
+    if [ -z "$branch" ]; then
+        branch="master"
+    fi
+    output=$({ zuul-cloner --branch "$branch" git://git.openstack.org $repo \
+               && (cd $repo && git review -s && git remote -v update \
+                   && git fetch -v --tags); } 2>&1)
+    _retval=$?
+    if [ $_retval -ne 0 ] ; then
+        echo "$output"
+    fi
+
+    return $_retval
+}
diff --git a/tools/list_unreleased_changes.sh b/tools/list_unreleased_changes.sh
new file mode 100755
index 0000000000..2156e99942
--- /dev/null
+++ b/tools/list_unreleased_changes.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+#
+# Provide a list of the unreleased changes in the given repositories
+
+if [[ $# -lt 2 ]]; then
+    echo "Usage: $(basename $0) <branch> <repo> [<repo>...]"
+    echo "repo should be e.g. openstack/glance"
+    exit 1
+fi
+
+branch="$1"
+shift
+repos="$@"
+
+TOOLSDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+BASEDIR=$(dirname $TOOLSDIR)
+source $TOOLSDIR/functions
+
+if [[ -z "$VIRTUAL_ENV" ]]; then
+    if [[ ! -d $BASEDIR/.tox/venv ]]; then
+        (cd $BASEDIR && tox -e venv --notest)
+    fi
+    source $BASEDIR/.tox/venv/bin/activate
+fi
+
+# Make sure no pager is configured so the output is not blocked
+export PAGER=
+
+setup_temp_space 'list-unreleased'
+
+function list_changes {
+    title "Unreleased changes in $repo ($branch)"
+    clone_repo $repo $branch
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+    cd $repo
+    prev_tag=$(get_last_tag)
+    if [ -z "$prev_tag" ]; then
+        echo "$repo has not yet been released"
+    else
+        echo
+        local end_sha=$(git log -n 1 --pretty=tformat:%h)
+        echo "Changes between $prev_tag and $end_sha"
+        echo
+        git log --no-color --no-merges --format='%h %ci %s' --graph ${prev_tag}..${end_sha}
+        echo
+    fi
+}
+
+# Show the unreleased changes for each repository.
+for repo in $repos; do
+    cd $MYTMPDIR
+    echo
+    list_changes "$repo"
+done