Gerador de Favicon online (pacote completo em uma única compra)
Just provide your original site logo (possibly simplified to best suit a favicon), optionally your main colors and your app
Gráficos 2D
Tudo sobre computação gráfica 2D, cores e arte.
Gerador de nuvem de palavras gratuito
Free, no registration and full of features wordcloud generator. Of course you can select the texts, but also fonts, deformations/warping,
Otimizador SVG online
Just upload any SVG file or paste its code, and you’ll get many tools to optimize and simplify your original
Desinfetante SVG
SVG format can embed almost any code, even executable. So unless you designed it yourself, to verity it before uploading
Plotly Chart-Studio
An excel like sheet, but with much more graphics power, for any king of charts and combinations of it. Steep
EasyEDA - Designer de Circuitos Eletrônicos
Perfect tool to online design electronic circuits (PCB). Exists online (registration is required) or downloadable standalone Windows, Linux and macOS.
Quadro branco online da WBO
Free online collaborative/shared whiteboard: you can draw either on the public whiteboard, accessible to all. For curiosity only, but you
Excalidraw Quadro Branco Online Gratuito
Uma das mais famosas plataformas gratuitas de quadros brancos colaborativos online, utilizada pelo Google e pela Meta para suas próprias aplicações e necessidades.
Dustsim Simulador de Poeira/Partículas Gratuito
An extremely addictive dust and particles simulation: add particle sources, attraction or repulsive fields (that you can move manually live
Explorador de Mandelbrot
Walk through an interactive 2D view of 5 types of fractals and variants: Mandelbrot, Burning ship, Tricorn, Cubic Mandelbrot, Cubic