Now that Alphabet is announced and making "G" alphabet represent as one of the company as Google under Alphabet, I assume the various google products will be converted into individual entity and will be an Alphabet Company.
Example YouTube will become a "Y" Company in Alphabet and may be referred as Youtube an Alphabet Company.
These are my assumption and I am not liable for any action on the same.
Listed below the Google Products Alphabet wise and amaze to see that they have products in All Alphabet.
A – Android / AdSense / Analytics / Ara / AdMob / Alerts
B – Blogger / Boston Dynamics / Books
C – Calico / Cardboard / Capital / Contact lenses
D – Drive / DeepMind / Design / DoubleClick
E – Earth / Express
F – Fiber / Fi / Flights / FeedBurner / Firebase / Finance
G – Google (duh) / Gmail / Glass / Groups
H – Hangouts
I – Images / Ingress / Inbox / Invite Media
J – Jump
K – Keep
L – Local / Loon
M – Maps / My Business / Makani
N – Nexus / News / Now / Nest
O – Offers
P – Plus / Play / Photos / Picasa / Pixate / Patents
Q – [Nexus] Q
R – Refine / reCaptcha
S – Search / Self-driving car / Shopping / SageTV / Stackdriver / Skybox / Skia / Scholar
T – Translate / Tango
U – URL shortener
V – Voice / Ventures / VirusTotal / Video
W – Wear / Wallet / Web Toolkit / Wing
X – Google X labs
Y – YouTube
Z – Project Zero / Zagat