Welcome! Just adding to this as I go, hope you find something useful in here.
Writing & Language
WriteTrack - Weighted word-count tracker and planner
Games & Entertainment
CompCon - Roll20 for Lancer, basically.
Dungeon Scrawl - TTRPG map maker
Nicky Case - Nicky Case's website; Mostly games and interactive educational experiences
CraftiNg & Diy
Canvas Patch Tutorial - Cheap and easy canvas patch instructions
CoPA - Commercial Pattern Archive, archive of paper patterns from 1847 onwards.
Cults3D - User-created STL files for printing. Both free and for-purchase.
How To Smooth PLA Prints - A variety of techniques for smoothing 3D PLA prints.
Make Plushie Patterns With Play-Doh and Paper Towels
Practical Embroidery, Overlock Stitch
Raven Amigurumi Pattern - Free pattern from I Crochet Things
RSN Stitchbank - Catalog of embroidery stitches and techniques
This to That - Site for advice about which glue to use for attaching various materials to each other
Science, nAture, & Tech
BugGuide.net - Insect & arachnid guides and community data gathering for the US & Canada. Excellent alternative to iNaturalist for bug IDs and information, if you're in the US or Canada.
How To Manage A Successful Bee Hotel - Species guide is Eastern US focused, but general practices and instructions applicable pretty much everywhere with solitary bee populations
CoCoRaHS - Citizen science initiative tracking precipitation across the USA, Canada, and the Bahamas
Meshtastic - Open-source mesh network info and instructions
Visual Drought Atlas - Citizen science; Compares landscapes across time and variations in precipitation; uses data from the above included CoCoRaHS.
safety, security, & Disaster preparedness
Meat-Space
Emergency Disinfection of Drinking Water
Online & Digital
CrimethInc: Doxcare, Prevention and Aftercare for Those Targeted by Doxxing and Political Harassment
FreeTube - Private YouTube client
KeePass - Password manager
Librewolf - Privacy-focused Firefox fork
Vivaldi - Web browser, AI-free and privacy-focused
Social & Political
Erin In The Morning - Posts regular updates on the state of anti-trans legislation in the USA
High-Demand Group Checklist - Traits of high-control groups/cults
The Transfeminine Review - Social, political, and media analysis from and for a transfeminine perspective
Software & Web Applications
Fully free or free version available unless otherwise indicated.
7-Zip Portable - Portable file compression/archiving
Audiveris - Sheet music to MXL converter
Focalboard - Desktop Kanban application. Made for team project management but has been working very well for managing personal tasks, goals, and meal planning.
Godot - Free, open-source game engine
Inform7 - Interactive fiction language
Joplin - Open-source note-taking app
JPEXS - Flash decompiler, if you have the .swf of a flash file you can open it up and access its assets and code
Obsidian - Note-taking application with graph-view functionality (My personal fave for note apps)
Transcribe! - Audio player specifically for transcription
Watch2Gether - Synced video player, great for virtual movie nights
Cyotek WebCopy - Tool for creating offline versions of websites
Miscellaneous
Game Accessibility Guidelines - Guide aimed towards video game developers
Habitica - Gamified to-do list site & mobile app
Ian's Shoelace Site - Shoelace info & lacing instructions
Parcels App - All-in-one package tracking site
Other Link Hubs
Credits
Header & Footer Images - FreeVector.com
Site Template - Sadgrl's Template Builder