Blender is an open-source 3D Design and creation suite. It is similar to Adobe After Effects in its functionality.
It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, even video editing and game creation.
Gravit is an open source desktop and online vector-based design application that can be used for a variety of applications. It most closely resembles Adobe Illustrator, but has an expanded range of user-friendly functions.
Easelly is an in-browser app that specifically deals with data visualization and infographic creation. It includes integration with data tables from excel and other programs for enhanced functionality.
Visme is an in-browser presentation design platform that poses a strong alternative to powerpoint.
Consider the Need and the Tools
Logo - use a vector-based design program (such as Adobe Illustrator or Inkscape) to combine lines, shapes, and typography in inventive ways.
Poster - Use a publishing-oriented program (such as Canva, Adobe Illustrator, Snappa, or LucidPress) to create large, colorful, and/or graphically interesting content.
You can also use these programs to make your conference posters stand out from the stock posters you see.
Presentation - Use a slide-oriented program (such as Power Point, Emaze, or Canva) to create and present.
Prezi gained momentum as an alternative, but poses substantial issues for accessibility and tends to make viewers dizzy.
Flyer - Use a design program (such as Canva, Adobe illustrator , Inkscape or Canva) that will help you create the right-sized, printable media to promote your event, service, program, etc.
Brochure - Use a publishing-oriented program (such as Canva, Adobe InDesign, Publisher, or Canva) to guarantee that you have the correct layout for printing, etc.
Computer Graphic - use a vector-based design program (such as adobe illustrator, inkscape, canva, or gimp) to create something using a blend of elements from different sources (including stock images, shapes, typography, etc) to create a visually interesting item for on-screen display.
Social Media Post - use a design-based program (Such as Adobe Illustrator, Inkscape, Canva, Gimp, Photoshop, Lucidpress, or Scribus) to create specifically-sized images that will work well as headers, post-sizes, profile images, etc. to promote specific events, services, programs, etc.
Enhanced Photograph - Use a photo-specific program (such as Adobe Photoshop or Gimp) to adjust, crop, and apply effects or doctor a photograph as needed.