pixelwolf.net
Ultimate 88x31 Generator helps create colors, gradients, pixel assets, or visual design elements.
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datacat.liverpool.ac.uk
DataCat: The Research Data Catalogue is a research data catalogue with deposit, search and browse functions. The catalogue now functions as a read-only repository, with dataset deposit performed via Elements. It supports OAI 2.0.
untrap.app
UnTrap is a browser extension that customizes YouTube by hiding Shorts, recommendations, comments and other distracting elements. It also offers scheduling, session limits, presets and video summaries. A free tier is available, and a Plus plan is offered at $3.99 per month or $35.99 per year.
urlquery.net
urlquery is an online service that scans webpages for malware, suspicious elements and reputation. Its homepage shows a list of analyzed URLs with detection counts, IP addresses and autonomous system information.
web.scraper.workers.dev
A simple web scraper powered by Cloudflare Workers, built by Adam Schwartz. Users provide a URL and CSS selector, and the tool returns JSON containing the text contents of matching webpage elements. The project is open-source and available on GitHub.
webelements.com
WebElements presents the periodic table of the elements. The table arranges the chemical elements by atomic number so that periodic properties are made clear, and each entry gives the element's symbol, atomic weight and name.
webslides.tv
WebSlides is a tool for creating HTML presentations with CSS. Each parent in the #webslides element is an individual slide, and the markup uses intuitive naming conventions. The site offers 120+ premade slides, 40+ components, and 500+ SVG icons, and requires basic knowledge of HTML. It is available as a free download on a pay-what-you-want basis.
wolframalpha.com
Wolfram|Alpha is a computational knowledge engine with broad knowledge and deep computational power in mathematics. It provides calculators and answers across elementary math, algebra, calculus, geometry, number theory, discrete and applied math, logic, functions, plotting, advanced mathematics, definitions, famous problems, continued fractions, and Common Core math. Users can get help with math homework, solve specific problems, or find information on mathematical subjects and topics.
henke.lbl.gov
The X-Ray Database is a reference from the Center for X-Ray Optics at Lawrence Berkeley National Laboratory. It provides access to atomic scattering factor files and lookups of x-ray properties of the elements, plus calculations for index of refraction, attenuation length, transmission, reflectivity and diffraction efficiency. It cites X-ray interaction data covering E=50-30000 eV for Z=1-92.
zperiod.app
Zperiod is an interactive periodic table covering 118 elements, with 3D atom models, ions, chemistry tools, and worksheet practice. It is presented as a desktop-only experience with an iPhone variant directing users to open it on a computer. Units include temperature, density, and energy.