gucharmap software package provides Unicode character picker and font browser, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gucharmap
gucharmap is installed in your system.
Make ensure the gucharmap package were installed using the commands given below,
$ sudo dpkg-query -l | grep gucharmap *
You will get with gucharmap package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | GNOME |
| Package | gucharmap |
| Version | 1:3.14.1-1 |
| Description | Unicode character picker and font browser |
| Sub Section | GNOME |