Warning:
Many of them, if not all, use pirated keys, reverse proxies, and
questionable sources. I’ll also be posting GitHub reverses here that
I’ve managed to figure out myself.

The legal ones are mostly paid and are marked separately.

openrouter.ai - (Legal/Paid)
Marking this one as legal. Strictly speaking, it's a paid service, but
the prices are literal pennies compared to subscription sites. Plus,
they have a whole section of completely free models (like Llama 3 and
Command R), so you can play without spending a dime. Perfect for
SillyTavern.

cohere.com - (Legal/Free)
Another legal option. You just register and get a free API key. Their
Command R and R+ models are practically built for roleplay, and you get a
massive 128k context completely for free. The only downside is it can
sometimes refuse super explicit NSFW, but a good jailbreak prompt fixes
that.

mancer.tech - (Legal/Freemium)
A great provider if you want to run uncensored, RP-focused models like
MythoMax without jumping through hoops. They give you a steady stream of
free credits that last a surprisingly long time, as long as you aren't
burning through them with maxed-out context on every message.

pawan.krd - (Reverse Proxy)
The good old classic of the reverse-proxy world. You get access through
their Discord. It goes down occasionally and they change their terms
sometimes, but if you need a solid free alternative to fall back on, it
does the job nicely.

https://freetheai.xyz/home/
- The best proxy. Gives free access to a bunch of top-tier models.
Stability is on the weak side. For a nominal fee, you can get the latest
Claude.

- The Airforce referral link gives you some neat perks. A solid, stable
proxy. 33k of free context—which is already more than Crushon gives you
for a ton of money. Unfortunately, it got too popular at one point, so
the freebies got capped.