florence software package provides extensible and scalable virtual keyboard for X, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install florence
florence is installed in your system.
Make ensure the florence package were installed using the commands given below,
$ sudo dpkg-query -l | grep florence *
You will get with florence package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Web Software |
| Package | florence |
| Version | 0.6.3-1+b1 [mips, mipsel], 0.6 |
| Description | extensible and scalable virtual keyboard for X |
| Sub Section | Web |