Free, Cloud Based, Offline AppCons:
Needs a donate button ;)
Gravit Designer is the BEST design program that I have ever used. Better than Adobe Illustrator, dare I say. While Gravit Designer looks simple on the outside, it is powerful, and has all the functionality of Illustrator, as well as more features. Give Gravit Designer a chance, and if it isn't for you, that's fine.
Gravit Designer comes with free cloud storage for your designs, a library with more than 50,000 free icons, and SVG, PDF, PNG, JPEG, EPS, and Sketch Files. Gravit Designer can export to SVG, PNG, JPEG, and PDF.Jerome Paulos has used this product for one year.