$ ls /etc/systemd/system
auditd.service
bumblebeed.service
dbus-org.wicd.daemon.service
default.target
default.target.wants
display-manager.service
getty.target.wants
graphical.target.wants
multi-user.target.wants
plymouth-quit-wait.service
plymouth-start.service
rtorrent.service
syslog.service
system-update.target.wants

$ systemctl -t service
UNIT                              LOAD   ACTIVE SUB     DESCRIPTION
bumblebeed.service                loaded active running Bumblebee C Daemon
cronie.service                    loaded active running Periodic Command Scheduler
dbus.service                      loaded active running D-Bus System Message Bus
dkms.service                      loaded active exited  Dynamic Kernel Modules System
dropbox@m42a.service              loaded active running Dropbox
getty@tty1.service                loaded active running Getty on tty1
laptop-mode.service               loaded active exited  Laptop Mode Tools
lm_sensors.service                loaded active exited  Initialize hardware monitoring sensors
ntpd.service                      loaded active running Network Time Service
rc-local.service                  loaded active exited  /etc/rc.local Compatibility
rtorrent.service                  loaded active running rtorrent Service
syslog-ng.service                 loaded active running System Logger Daemon
systemd-binfmt.service            loaded active exited  Set Up Additional Binary Formats
systemd-journald.service          loaded active running Journal Service
systemd-logind.service            loaded active running Login Service
systemd-modules-load.service      loaded active exited  Load Kernel Modules
systemd-readahead-collect.service loaded active exited  Collect Read-Ahead Data
systemd-readahead-replay.service  loaded active exited  Replay Read-Ahead Data
systemd-remount-fs.service        loaded active exited  Remount Root and Kernel File Systems
systemd-sysctl.service            loaded active exited  Apply Kernel Variables
systemd-tmpfiles-setup.service    loaded active exited  Recreate Volatile Files and Directories
systemd-udev-trigger.service      loaded active exited  udev Coldplug all Devices
systemd-udevd.service             loaded active running udev Kernel Device Manager
systemd-user-sessions.service     loaded active exited  Permit User Sessions
systemd-vconsole-setup.service    loaded active exited  Setup Virtual Console
wicd.service                      loaded active running Wicd a wireless and wired network manager for Linux
xdm.service                       loaded active running X-Window Display Manager

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

27 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

$ systemctl -t target
UNIT                LOAD   ACTIVE SUB    DESCRIPTION
arch-daemons.target loaded active active Arch Daemons
basic.target        loaded active active Basic System
cryptsetup.target   loaded active active Encrypted Volumes
getty.target        loaded active active Login Prompts
graphical.target    loaded active active Graphical Interface
local-fs-pre.target loaded active active Local File Systems (Pre)
local-fs.target     loaded active active Local File Systems
multi-user.target   loaded active active Multi-User
network.target      loaded active active Network
remote-fs.target    loaded active active Remote File Systems
sockets.target      loaded active active Sockets
swap.target         loaded active active Swap
sysinit.target      loaded active active System Initialization

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

13 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.