some signal cli clients were discussed on the mailing list yesterday:
<a href="https:&#x2F;&#x2F;lists.riseup.net&#x2F;www&#x2F;arc&#x2F;whispersystems&#x2F;2015-12&#x2F;msg00003.html" rel="nofollow">https:&#x2F;&#x2F;lists.riseup.net&#x2F;www&#x2F;arc&#x2F;whispersystems&#x2F;2015-12&#x2F;msg0...</a>