The Best Datasheet4U Alternatives in 2026

ThrustCurve provides model and high-power hobby rocket motor data, including manufacturer specifications and certified performance.

eCalc simulates electric drives for radio-controlled models and helps users select motors and components.

BOMwiki breaks down thousands of products into their component parts through a bill-of-materials encyclopedia.

EasyEDA supports circuit design, simulation, and PCB layout through an online electronic design environment.

With Horizon EDA, users can manage electronic parts, draw schematics and create PCB layouts.

KiCad is open-source software for drawing electronic schematics, designing printed circuit boards and viewing them in 3D.

A curated GitHub list gathers software and hardware resources for electronic engineers and hobbyists.

SKiDL uses Python to design electronic circuits, with KiCad and schematics among the repository's listed topics.

MathNet lets users browse and search more than 30,000 Olympiad-level problems from 47 countries in 17 languages.

Jacobs Rocketry documents experimental rocketry using sugar propellant.

This project documents an amateur-built liquid-fueled rocket engine and flight vehicle, including engine project pages.

My Balsa & Glass Workshop documents scratch-built balsa radio-controlled models and workshop projects.

RecentlyExtinctSpecies documents recently extinct, missing, and other species in an online database.

Periodic Table App lets users search chemical elements and view properties in an interactive periodic table.

Outerzone lets visitors search and browse plans for model aircraft, including its catalog of more than 16,000 plans.

MolView lets users search chemical compounds and access molecular viewing and chemistry information.

Airfoil Tools lets users search among 1,638 airfoils and load airfoil data for analysis.

The Online Encyclopedia of Integer Sequences lets visitors search integer sequences and contribute through its community-supported site.

EMRap provides medical education resources including courses, procedures, imaging, and videos.

FlowingData publishes articles, projects, and learning resources about data visualization and statistics.

Passmedicine offers online revision for the 2026 UCAT, with resources for exam preparation.

The OpenRocket wiki provides collaboratively written documentation for the open-source model rocket simulator.

IBM SkillsBuild provides free AI and technology teaching resources, including lesson plans, educator training, and toolkits.

OneZoom lets visitors browse an interactive tree of life, with suggested starting points for groups of organisms.