The Best OEIS Alternatives in 2026

The Wikispecies project lets visitors browse and contribute information about species through its online reference pages.

OpenRocket is model rocket simulation software with a download and information about supported operating systems.

EyeWiki offers an eye encyclopedia written by physicians and surgeons, with reference information for readers.

Manager uses BOINC volunteer computing to let participants contribute computing resources to projects.

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

Explore the Animalia online encyclopedia for information about familiar animal species and ones that may be less well known.

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

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

PC Progress provides website account and information resources for visitors and general users.

Visitors can choose from interactive simulations on oPhysics to explore and learn about physics topics.

V2Rocket provides experimental rocketry updates and a way for visitors to send comments and questions.

Interactive 4D Handbook lets visitors manipulate four-dimensional shapes and explore 4D concepts.

Visitors can use Wumbo as a math reference site for students, teachers, and enthusiasts.

The Ferns provides information about ferns and invites visitors to support the site.

Spider ID helps visitors identify spiders and provides information for novices and experienced users.

Visitors can explore chemical elements in the interactive periodic table at Periodic-Table.io, which offers multiple language options.

Rink lets visitors run queries in a browser and view the results locally without leaving the page.

Pattern Radio uses AI to explore thousands of hours of humpback whale recordings and help visitors examine acoustic patterns.

Open Source Guides offers resources for people and organizations learning to run or contribute to open-source projects.

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

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

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

Datasheet4U searches datasheets for more than 900,000 electronic components, with specifications and PDF documents.

The community-maintained Manim Python library supports the creation of mathematical animations.