ZAX is hosted on GitHub
ZAX is a mobile frontend for the Zabbix enterprise monitoring system. It is free and has no limits.
This app shows you not only active triggers, events and latest item data, but has a few more features:

First, you need an account for PubNub, a realtime push service. Sign up for free at http://www.pubnub.com/ if you don’t have an existing account.
Download pubnub.pl and open it with an editor. Replace the $pubkey and $subkey variables with your keys (http://www.pubnub.com/account#api-keys).
Copy the pubnub.pl file into the Zabbix AlertScriptPath. The AlertScriptPath is set in the Zabbix configuration.
Open the Zabbix web frontend.
Go to Administration -> Media types. Create a new Media type for the script pubnub.pl.

Go to Administration -> Users. Add for your user the Media type you created before.

Go to Configuration -> Actions. Create an action for a trigger that sends a message to your user.
Important: subject and message must be set to:
{TRIGGER.ID}
Default message:
status={STATUS}
message={HOSTNAME}: {TRIGGER.NAME}: {STATUS}

inovex GmbH
Karlsruher Straße 71
D-75179 Pforzheim
Tel +49.(0)7231.3191-0
Fax +49.(0)7231.3191-91
info@inovex.de
Business Manager: Stephan Müller
Registered Office: Pforzheim
AG Mannheim, HRB 502126
USt-ID according to § 27 a Umsatzsteuergesetz: DE 144 196 117