signal-desktop (Signal for Desktop) Signal is an encrypted instant messaging and voice calling application for Android, iOS, and the desktop. It uses the Internet to send one-to-one and group messages, which can include images and video messages, and make one-to-one voice/video calls. This is a repackaging of the official binary .deb file distributed by Open Whipser Systems. WARNING: You need to be running the glibc package from testing/packages/binutils-gcc-glibc on slackware 15.0 if you want to run this version. Otherwise, you can use the signal-desktop-legacy package whist is the last version that can run with the glibc version in the main slackware 15.0. This version runs fine on slackware-current.