🧓 Old MASTER LIST

Currently available bundles

Fanatical

Humble Bundle - Bundles end at 11AM PST

IndieGala - Bundles end at 11AM PST

itch.io

No bundles.

Day of the Devs

No bundles.

Groupees

Groupees is selling keys without developers permission, buy their bundles at your own risk.

You can read more about this topic here or in the comments from this thread.

After some further investigation, as of 04 Apr 2023, Groupees is now banned from /r/GameDeals.
Many thanks to the user who brought this issue to their attention.

Until they start releasing real bundles (and not ones featuring only keys sourced from the grey markets), I will not open or maintain any Groupees related threads.
Feel free to report them here though, or even open threads for them.

DailyIndieGame

DIG might be selling keys without developers permission, so the keys might be revoked in the future, buy their bundles at your own risk. Source

Starting with DIG Weekly Bundle 800 I will not open or maintain any DIG related threads. (explanation here)

You can also check this post for a summary of what the common practices of DIG seem to be.
🌟 NEW 2024-01-04: Star Valor keys being sold without the dev's approval & DIG's sarcastic answer to that

GMG

To be added here if any exist.

PSA: GMG end and restart their bundles whenever they want without any notice

All bundles are listed in the chart without referrals, I'm not profiting from maintaining this list in any way. Referral links created automatically by SteamGifts, you can disable them in your SG account settings - https://www.steamgifts.com/account/settings/referrals

Wondering what games you already own from each bundle? There's an extension/ UserScript for that - check it out