無料ワードクラウドジェネレーター

Free, no registration and full of features wordcloud generator. Of course you can select the texts, but also fonts, deformations/warping, colors, and even draw your own external shape to fill. Then just save it in multiple formats. The kind of work that takes otherwise hours in XPress or Illustrator to do.
オンラインSVGオプティマイザー

Just upload any SVG file or paste its code, and you’ll get many tools to optimize and simplify your original shape to gain the extra Octet or Ko. Note that it worth a lot for complex SVG, but if your SVG comes from a famous icon supplier or similar, you won’t improve much as they already did it. Also useful to inspect suspicious SVG, as it can contain a bit of anything but shapes and colors.
SVG消毒剤

SVG format can embed almost any code, even executable.So unless you designed it yourself, to verity it before uploading somewhere is a must.This free online tool focuses only on this, rather than the versatile SVG Optimizer that we also recommend and list in the 2D section.
Plotly Chart-Studio

An excel like sheet, but with much more graphics power, for any king of charts and combinations of it. Steep learning curve, because of many possibilities. We recommend to start and practice with the public community projects. Can export on PNG. Other formats requires a registration.
EasyEDA 電子回路設計ツール

Perfect tool to online design electronic circuits (PCB). Exists online (registration is required) or downloadable standalone Windows, Linux and macOS. The nicest feature is the large collection of components and associated footprints.
WBOオンラインホワイトボード

Free online collaborative/shared whiteboard: you can draw eitheron the public whiteboard, accessible to all. For curiosity only, but you may find an artist.or have your own private board, accessible with unique code. A must for creative meetings where live drawing or live sketches add to the explanations.A free pencil, some basic shapes and texts can be used with any color. Additionally, a grid can be set and the result can be saved in SVG format. Simple but very handy! This is the hosted version of the WBO (“Whiteboard Online“) software. If you are really concerned about privacy, you can also get the free GitHub source and install it on your server.
Excalidraw 無料オンラインホワイトボード

One of the most famous free online collaborative whiteboard, used by Google or Meta for their own applications or needs.Many great tools, including:all usual drawing tools. The thickness of the free drawing depends on the speed, so nice effects are possibleflowchart generation, either by AI with a prompt, or be inserting the flowchart in the Mermaid (use the “text to flowchart” item)a laser pointer to point without drawing, and many othersYou can save your word by either:saving the file locally (free)saving a encrypted link that can be accessed later (free)saving to your Excalidraw+ account (paid)Or you can export it (as .PNG or .SVG or to the clipboard)Tip: a very smooth […]
Dustsim 無料の粉塵/粒子シミュレーター

An extremely addictive dust and particles simulation: add particle sources, attraction or repulsive fields (that you can move manually live if needed). You can load predefined templates on the top right and modify them at will, or start by a blank page. Is it a game, or a real dynamics simulation? a bit of both. We just miss hard walls or similar.
マンデルブロエクスプローラー

Walk through an interactive 2D view of 5 types of fractals and variants: Mandelbrot, Burning ship, Tricorn, Cubic Mandelbrot, Cubic Ship You can zoom in or out and increase number of iterations to see how the shape evolves or repeats itself. You can execute the software online or download your own Windows x32, x64, so as an Android version.