The logo is created in Inkscape, a professional vector graphics editor for Windows, Mac OS X and Linux. Inkscape is free and open source.
The Hashtag icon served as a basis for the logo. It is made by Freepik and downloaded from www.flaticon.com. The Hashtag icon is licensed by Creative Commons BY 3.0 (CC 3.0 BY).
The screen is captured with CamStudio, a free and open source desktop recorder streaming video software.
The resulting AVI file is converted to animated GIF in VirtualDub, a free and open source video capture/processing utility.