diff --git a/helpers/go b/helpers/go
index fd7117414..0e18301f7 100644
--- a/helpers/go
+++ b/helpers/go
@@ -30,7 +30,7 @@ export GOENV_ROOT="$goenv_install_dir"
 # However, $PATH is duplicated into $go_path to outlast any manipulation of $PATH
 # You can use the variable `$ynh_go_load_path` to quickly load your Go version
 #  in $PATH for an usage into a separate script.
-# Exemple: $ynh_go_load_path $install_dir/script_that_use_gem.sh`
+# Exemple: `$ynh_go_load_path $install_dir/script_that_use_gem.sh`
 #
 #
 # Finally, to start a Go service with the correct version, 2 solutions
diff --git a/helpers/redis b/helpers/redis
new file mode 100644
index 000000000..545bb8705
--- /dev/null
+++ b/helpers/redis
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# get the first available redis database
+#
+# usage: ynh_redis_get_free_db
+# | returns: the database number to use
+ynh_redis_get_free_db() {
+	local result max db
+	result=$(redis-cli INFO keyspace)
+
+	# get the num
+	max=$(cat /etc/redis/redis.conf | grep ^databases | grep -Eow "[0-9]+")
+
+	db=0
+	# default Debian setting is 15 databases
+	for i in $(seq 0 "$max")
+	do
+	 	if ! echo "$result" | grep -q "db$i"
+	 	then
+			db=$i
+	 		break 1
+ 		fi
+ 		db=-1
+	done
+
+	test "$db" -eq -1 && ynh_die --message="No available Redis databases..."
+
+	echo "$db"
+}
+
+# Create a master password and set up global settings
+# Please always call this script in install and restore scripts
+#
+# usage: ynh_redis_remove_db database
+# | arg: database - the database to erase
+ynh_redis_remove_db() {
+	local db=$1
+	redis-cli -n "$db" flushdb
+}
diff --git a/helpers/ruby b/helpers/ruby
new file mode 100644
index 000000000..cc7c73f90
--- /dev/null
+++ b/helpers/ruby
@@ -0,0 +1,306 @@
+#!/bin/bash
+
+rbenv_install_dir="/opt/rbenv"
+ruby_version_path="$rbenv_install_dir/versions"
+
+# RBENV_ROOT is the directory of rbenv, it needs to be loaded as a environment variable.
+export RBENV_ROOT="$rbenv_install_dir"
+export rbenv_root="$rbenv_install_dir"
+
+if dpkg --compare-versions ${YNH_APP_PACKAGING_FORMAT:-0} lt 2; then
+	build_ruby_dependencies="libjemalloc-dev curl build-essential libreadline-dev zlib1g-dev libsqlite3-dev libssl-dev libxml2-dev libxslt-dev autoconf automake bison libtool"
+	build_pkg_dependencies="$build_pkg_dependencies $build_ruby_dependencies"
+fi
+
+# Load the version of Ruby for an app, and set variables.
+#
+# ynh_use_ruby has to be used in any app scripts before using Ruby for the first time.
+# This helper will provide alias and variables to use in your scripts.
+#
+# To use gem or Ruby, use the alias `ynh_gem` and `ynh_ruby`
+# Those alias will use the correct version installed for the app
+# For example: use `ynh_gem install` instead of `gem install`
+#
+# With `sudo` or `ynh_exec_as`, use instead the fallback variables `$ynh_gem` and `$ynh_ruby`
+# And propagate $PATH to sudo with $ynh_ruby_load_path
+# Exemple: `ynh_exec_as $app $ynh_ruby_load_path $ynh_gem install`
+#
+# $PATH contains the path of the requested version of Ruby.
+# However, $PATH is duplicated into $ruby_path to outlast any manipulation of $PATH
+# You can use the variable `$ynh_ruby_load_path` to quickly load your Ruby version
+#  in $PATH for an usage into a separate script.
+# Exemple: $ynh_ruby_load_path $final_path/script_that_use_gem.sh`
+#
+#
+# Finally, to start a Ruby service with the correct version, 2 solutions
+#  Either the app is dependent of Ruby or gem, but does not called it directly.
+#  In such situation, you need to load PATH
+#    `Environment="__YNH_RUBY_LOAD_PATH__"`
+#    `ExecStart=__FINALPATH__/my_app`
+#     You will replace __YNH_RUBY_LOAD_PATH__ with $ynh_ruby_load_path
+#
+#  Or Ruby start the app directly, then you don't need to load the PATH variable
+#    `ExecStart=__YNH_RUBY__ my_app run`
+#     You will replace __YNH_RUBY__ with $ynh_ruby
+#
+#
+# one other variable is also available
+#   - $ruby_path: The absolute path to Ruby binaries for the chosen version.
+#
+# usage: ynh_use_ruby
+#
+# Requires YunoHost version 3.2.2 or higher.
+ynh_use_ruby () {
+    ruby_version=$(ynh_app_setting_get --app=$app --key=ruby_version)
+
+    # Get the absolute path of this version of Ruby
+    ruby_path="$ruby_version_path/$YNH_APP_INSTANCE_NAME/bin"
+
+    # Allow alias to be used into bash script
+    shopt -s expand_aliases
+
+    # Create an alias for the specific version of Ruby and a variable as fallback
+    ynh_ruby="$ruby_path/ruby"
+    alias ynh_ruby="$ynh_ruby"
+    # And gem
+    ynh_gem="$ruby_path/gem"
+    alias ynh_gem="$ynh_gem"
+
+    # Load the path of this version of Ruby in $PATH
+    if [[ :$PATH: != *":$ruby_path"* ]]; then
+        PATH="$ruby_path:$PATH"
+    fi
+    # Create an alias to easily load the PATH
+    ynh_ruby_load_path="PATH=$PATH"
+
+    # Sets the local application-specific Ruby version
+    pushd ${install_dir:-$final_path}
+        $rbenv_install_dir/bin/rbenv local $ruby_version
+    popd
+}
+
+# Install a specific version of Ruby
+#
+# ynh_install_ruby will install the version of Ruby provided as argument by using rbenv.
+#
+# This helper creates a /etc/profile.d/rbenv.sh that configures PATH environment for rbenv
+# for every LOGIN user, hence your user must have a defined shell (as opposed to /usr/sbin/nologin)
+#
+# Don't forget to execute ruby-dependent command in a login environment
+# (e.g. sudo --login option)
+# When not possible (e.g. in systemd service definition), please use direct path
+# to rbenv shims (e.g. $RBENV_ROOT/shims/bundle)
+#
+# usage: ynh_install_ruby --ruby_version=ruby_version
+# | arg: -v, --ruby_version= - Version of ruby to install.
+#
+# Requires YunoHost version 3.2.2 or higher.
+ynh_install_ruby () {
+    # Declare an array to define the options of this helper.
+    local legacy_args=v
+    local -A args_array=( [v]=ruby_version= )
+    local ruby_version
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+
+    # Load rbenv path in PATH
+    local CLEAR_PATH="$rbenv_install_dir/bin:$PATH"
+
+    # Remove /usr/local/bin in PATH in case of Ruby prior installation
+    PATH=$(echo $CLEAR_PATH | sed 's@/usr/local/bin:@@')
+
+    # Move an existing Ruby binary, to avoid to block rbenv
+    test -x /usr/bin/ruby && mv /usr/bin/ruby /usr/bin/ruby_rbenv
+
+    # Install or update rbenv
+    mkdir -p $rbenv_install_dir
+    rbenv="$(command -v rbenv $rbenv_install_dir/bin/rbenv | grep "$rbenv_install_dir/bin/rbenv" | head -1)"
+    if [ -n "$rbenv" ]; then
+        pushd "${rbenv%/*/*}"
+            if git remote -v 2>/dev/null | grep "https://github.com/rbenv/rbenv.git"; then
+                ynh_print_info --message="Updating rbenv..."
+                git pull -q --tags origin master
+                ynh_ruby_try_bash_extension
+            else
+                ynh_print_info --message="Reinstalling rbenv..."
+                cd ..
+                ynh_secure_remove --file=$rbenv_install_dir
+                mkdir -p $rbenv_install_dir
+                cd $rbenv_install_dir
+                git init -q
+                git remote add -f -t master origin https://github.com/rbenv/rbenv.git > /dev/null 2>&1
+                git checkout -q -b master origin/master
+                ynh_ruby_try_bash_extension
+                rbenv=$rbenv_install_dir/bin/rbenv
+            fi
+        popd
+    else
+        ynh_print_info --message="Installing rbenv..."
+        pushd $rbenv_install_dir
+            git init -q
+            git remote add -f -t master origin https://github.com/rbenv/rbenv.git > /dev/null 2>&1
+            git checkout -q -b master origin/master
+            ynh_ruby_try_bash_extension
+            rbenv=$rbenv_install_dir/bin/rbenv
+        popd
+    fi
+
+    mkdir -p "${rbenv_install_dir}/plugins"
+
+    ruby_build="$(command -v "$rbenv_install_dir"/plugins/*/bin/rbenv-install rbenv-install | head -1)"
+    if [ -n "$ruby_build" ]; then
+        pushd "${ruby_build%/*/*}"
+            if git remote -v 2>/dev/null | grep "https://github.com/rbenv/ruby-build.git"; then
+                ynh_print_info --message="Updating ruby-build..."
+                git pull -q origin master
+            fi
+        popd
+    else
+        ynh_print_info --message="Installing ruby-build..."
+        git clone -q https://github.com/rbenv/ruby-build.git "${rbenv_install_dir}/plugins/ruby-build"
+    fi
+
+    rbenv_alias="$(command -v "$rbenv_install_dir"/plugins/*/bin/rbenv-alias rbenv-alias | head -1)"
+    if [ -n "$rbenv_alias" ]; then
+        pushd "${rbenv_alias%/*/*}"
+            if git remote -v 2>/dev/null | grep "https://github.com/tpope/rbenv-aliases.git"; then
+                ynh_print_info --message="Updating rbenv-aliases..."
+                git pull -q origin master
+            fi
+        popd
+    else
+        ynh_print_info --message="Installing rbenv-aliases..."
+        git clone -q https://github.com/tpope/rbenv-aliases.git "${rbenv_install_dir}/plugins/rbenv-aliase"
+    fi
+
+    rbenv_latest="$(command -v "$rbenv_install_dir"/plugins/*/bin/rbenv-latest rbenv-latest | head -1)"
+    if [ -n "$rbenv_latest" ]; then
+        pushd "${rbenv_latest%/*/*}"
+            if git remote -v 2>/dev/null | grep "https://github.com/momo-lab/xxenv-latest.git"; then
+                ynh_print_info --message="Updating xxenv-latest..."
+                git pull -q origin master
+            fi
+        popd
+    else
+        ynh_print_info --message="Installing xxenv-latest..."
+        git clone -q https://github.com/momo-lab/xxenv-latest.git "${rbenv_install_dir}/plugins/xxenv-latest"
+    fi
+
+    # Enable caching
+    mkdir -p "${rbenv_install_dir}/cache"
+
+    # Create shims directory if needed
+    mkdir -p "${rbenv_install_dir}/shims"
+
+    # Restore /usr/local/bin in PATH
+    PATH=$CLEAR_PATH
+
+    # And replace the old Ruby binary
+    test -x /usr/bin/ruby_rbenv && mv /usr/bin/ruby_rbenv /usr/bin/ruby
+
+    # Install the requested version of Ruby
+    local final_ruby_version=$(rbenv latest --print $ruby_version)
+    if ! [ -n "$final_ruby_version" ]; then
+        final_ruby_version=$ruby_version
+    fi
+    ynh_print_info --message="Installing Ruby $final_ruby_version"
+    RUBY_CONFIGURE_OPTS="--disable-install-doc --with-jemalloc" MAKE_OPTS="-j2" rbenv install --skip-existing $final_ruby_version > /dev/null 2>&1
+
+    # Store ruby_version into the config of this app
+    ynh_app_setting_set --app=$YNH_APP_INSTANCE_NAME --key=ruby_version --value=$final_ruby_version
+
+    # Remove app virtualenv
+    if rbenv alias --list | grep --quiet "$YNH_APP_INSTANCE_NAME "
+    then
+        rbenv alias $YNH_APP_INSTANCE_NAME --remove
+    fi
+
+    # Create app virtualenv
+    rbenv alias $YNH_APP_INSTANCE_NAME $final_ruby_version
+
+    # Cleanup Ruby versions
+    ynh_cleanup_ruby
+
+    # Set environment for Ruby users
+    echo  "#rbenv
+export RBENV_ROOT=$rbenv_install_dir
+export PATH=\"$rbenv_install_dir/bin:$PATH\"
+eval \"\$(rbenv init -)\"
+#rbenv" > /etc/profile.d/rbenv.sh
+
+    # Load the environment
+    eval "$(rbenv init -)"
+}
+
+# Remove the version of Ruby used by the app.
+#
+# This helper will also cleanup Ruby versions
+#
+# usage: ynh_remove_ruby
+ynh_remove_ruby () {
+    local ruby_version=$(ynh_app_setting_get --app=$YNH_APP_INSTANCE_NAME --key=ruby_version)
+
+    # Load rbenv path in PATH
+    local CLEAR_PATH="$rbenv_install_dir/bin:$PATH"
+
+    # Remove /usr/local/bin in PATH in case of Ruby prior installation
+    PATH=$(echo $CLEAR_PATH | sed 's@/usr/local/bin:@@')
+
+    rbenv alias $YNH_APP_INSTANCE_NAME --remove
+
+    # Remove the line for this app
+    ynh_app_setting_delete --app=$YNH_APP_INSTANCE_NAME --key=ruby_version
+
+    # Cleanup Ruby versions
+    ynh_cleanup_ruby
+}
+
+# Remove no more needed versions of Ruby used by the app.
+#
+# This helper will check what Ruby version are no more required,
+# and uninstall them
+# If no app uses Ruby, rbenv will be also removed.
+#
+# usage: ynh_cleanup_ruby
+ynh_cleanup_ruby () {
+
+    # List required Ruby versions
+    local installed_apps=$(yunohost app list | grep -oP 'id: \K.*$')
+    local required_ruby_versions=""
+    for installed_app in $installed_apps
+    do
+        local installed_app_ruby_version=$(ynh_app_setting_get --app=$installed_app --key="ruby_version")
+        if [[ -n "$installed_app_ruby_version" ]]
+        then
+            required_ruby_versions="${installed_app_ruby_version}\n${required_ruby_versions}"
+        fi
+    done
+    
+    # Remove no more needed Ruby versions
+    local installed_ruby_versions=$(rbenv versions --bare --skip-aliases | grep -Ev '/')
+    for installed_ruby_version in $installed_ruby_versions
+    do
+        if ! echo ${required_ruby_versions} | grep -q "${installed_ruby_version}"
+        then
+            ynh_print_info --message="Removing Ruby-$installed_ruby_version"
+            $rbenv_install_dir/bin/rbenv uninstall --force $installed_ruby_version
+        fi
+    done
+
+    # If none Ruby version is required
+    if [[ -z "$required_ruby_versions" ]]
+    then
+        # Remove rbenv environment configuration
+        ynh_print_info --message="Removing rbenv"
+        ynh_secure_remove --file="$rbenv_install_dir"
+        ynh_secure_remove --file="/etc/profile.d/rbenv.sh"
+    fi
+}
+
+ynh_ruby_try_bash_extension() {
+  if [ -x src/configure ]; then
+    src/configure && make -C src || {
+      ynh_print_info --message="Optional bash extension failed to build, but things will still work normally."
+    }
+  fi
+}