Astronomy
✦ 3D Interactive Asteroid Space Visualization - choose a date, see where the asteroids are in the inner solar system
✦ Solar System Scope - online, interactive, 3D model of the solar system and night sky. Includes dwarf planets!
✦ The Planets Today - see where the planets are in the solar system at any date
Art
✦ Apophysis AV - fractal flame generator
✦ AdorkaStock - pose references
✦ Coolors - color palette generator
✦ FireAlpaca - free digital painting software
✦ GNU Image Manipulation Program (GIMP) - free, open-source image editor/art software
Conlanging & Linguistics
✦ Gleb - random phonology generator known for generating absolutely ridiculous phonologies
✦ Index Diachronica - search sound changes in lots of languages
✦ IPA keyboard - type IPA symbols!
✦ World Atlas of Language Structures (WALS) - a database of language properties
Science
✦ Deep Time Maps - maps of ancient earth
✦ earth :: a global map of wind, weather, and ocean conditions - exactly what it sounds like
SFFH Magazines
Last updated 1 August 2023 to add IZ Digital
✦ Apex Magazine - a magazine of fantastical fiction, interviews, & essays.
✦ Beneath Ceaseless Skies - a literary fantasy magazine. One story per issue is available in podcast form.
✦ Clarkesworld - a monthly SF/F magazine. All stories are available in podcast form.
✦ Constelación Magazine - a bilingual English/Spanish speculative fiction magazine prioritizing authors from Latin America & the Caribbean. No longer publishing.
✦ Daily Science Fiction - a website that publishes short science fiction every weekday. You can subscribe by email to have each story emailed to you. No longer publishing.
✦ The Dark Magazine - a magazine of horror and dark fantasy. Certain stories are available in podcast form.
✦ The Deadlands - a monthly speculative fiction magazine exploring Death and its relation to the living.
✦ Escape Pod - a weekly podcast of science fiction.
✦ Fantasy Magazine - a magazine focusing entirely on fantasy.
✦ Fireside Magazine - a magazine of shorter stories (under 3000 words) of any genre. No longer publishing.
✦ IZ Digital - a magazine publishing fiction from all over the world.
✦ Kaleidotrope - an quarterly SFF zine.
✦ khōréō magazine - a quarterly genre magazine that primarily focuses on themes of migration.
✦ Lightspeed Magazine - a magazine of SF/F fiction & nonfiction. Four stories per issue are also available in podcast form.
✦ Nightmare Magazine - a horror and dark fantasy magazine of short stories, flash fiction, poetry, editorials, and reviews. Two stories per issue are available in podcast form.
✦ Omenana Magazine - a tri-monthly magazine of speculative fiction by African & African diaspora authors.
✦ Podcastle - a weekly podcast of fantasy fiction.
✦ Reactor (formerly Tor.com) - publishes a few pieces of original fiction per month.
✦ Space Fantasy Magazine - a magazine of space fantasy flash fiction.
✦ Strange Horizons - a weekly magazine of SF/F/H fiction, poetry, reviews, essays, and interviews. Most (all?) of the fiction & poetry is available in podcast form.
✦ Translunar Travelers Lounge - a magazine of fun speculative fiction.
✦ Uncanny Magazine - a bimonthly magazine of SF/F fiction & poetry, interviews, essays, and editorials. Certain stories are available in podcast form.
Other
✦ Native-Land.ca - territories, languages, and treaties of indigenous peoples around the world
✦ Retail Archaeology - dead malls, retail history, and retro games & toys
✦ RSS feeds, feed readers, etc. (smallweb.dreamwidth.org) - a guide on RSS feed readers, how to find RSS feeds, and what can be added to a reader. Comments have plenty of useful information.
Webcomics
✦ Blanco by CB Webb - on hiatus
✦ Bookwyrms by Lorena Garcia - currently updating
✦ Let's Speak English by Mary Cagle - Complete!
✦ leveL by Nate Swineheart - on hiatus?
✦ Now Recharging by "Maiji" Mary Huang - Complete!
✦ The Pale by Jay and Sanders Fabares - on hiatus
✦ Sleepless Domain by Mary Cagle - currently updating
✦ Tales from Alderwood by medli20 - currently updating
✦ Thistil Mistil Kistil by Sarah Schanze - on hiatus
✦ Wilde Life by Pascalle Lepas - currently updating
Web Development
✦ How to Build a Personal Website (Kiriska) - A guide on how to build a website, going over domain registration and hosts
✦ Notepad++ - A code editor. It's what I use to code this website.
✦ W3Schools - learn to code
Writing & Worldbuilding
✦ Artifexian - videos about worldbuilding
✦ Atomic Rockets - hard science fiction reference site
✦ Behind the Name - database of first names
✦ City Generator - online city generator
✦ List of timed artistic challenges - not just writing, but art, comics, etc.
✦ Seventh Sanctum - random generators