annona 
A service for posting anonymous messages to a Slack channel. Your message shows up under the guise of a random character.
Based on and [Slacker] (http://slacker.nathanhoad.net/) and anonymous-slack
As a slack administrator:
In Slack integrations, add a Slash command, for example, /anon . Set the URL in Slack to your service URL. The resulting slack "token" should be set as a environment variable:
INCOMING_SLACK_TOKEN=XXX
Then, in Slack integrations, add a Slash Incoming webhook. The resulting "webhook url" should be set as environment variable:
INCOMING_SLACK_WEBHOOK=https://hooks.slack.com/services/BLAH/BLAH/BLAH
The channel that the messages will appear in is set set as environment variable:
SLACK_CHANNEL_ID="#anon"
master
Success! Now if you send a message in any channel, public or private, like the following:
/anon Who am I ?
That message will be suppressed, and a message will appear in the SLACK_CHANNEL_ID channel
Avatars
Avatars are in the avatars.json file.
Here is an example for an avatar
{
"username": "Tina",
"default_text": "Errrggggggg",
"icon_url": "http://i.imgur.com/VxDC1dz.png"
},