New claimable freebies:
- Annual Intruders (Strategy)
- Prophet Launcher 3D (Action/Shooter/Survival, Windows)
- World of soccer 21 (Sports, Windows)
- Rebel World - Survive (Adventure/Role Playing/Survival, Windows, In development)
- Thirty Cycles (Role Playing, Windows)
- Rastooty (Shooter, Android, On hold)
- Artifarm (Strategy/Survival, Windows/Linux, In development)
- A Dance with Anxiety: Escapism (Platformer, Windows/HTML5) - limited number of copies!
- Choose the cat (Action, Android)
- Crazy shooter (Shooter/Action, Windows, In development)
- INNER (Puzzle, Windows)
- Lillyann (Visual Novel)

New claimable freebies:
- For Sparta (Action/Fighting, Windows, In development)
- Golden Quest (Platformer, Linux)
- Golden Quest 2 (Platformer, Linux)
- Stream Trivia Quiz (Windows, In development)
- Alchemy Quest (Action, Windows)
- JumpInTheHole part one (BETA). (Windows/Linux)

Bombarium

For Windows 10 64-bit

Bombarium is fast-paced action arcade multiplayer game for 2-4 players in deathmatch mode or one player vs monsters in singleplayer mode on several unique battlegrounds. Collect upgrades and power-ups and smash other players or monsters with the bombs in time limit. Player with the most kills at the end win.

New claimable freebies:
- Cluster (Shooter/Action, Windows)
- Ragslash (Windows, In development)

New claimable freebies:
- Hell Droid (Action/Adventure/Shooter/Survival, Windows)

There are more game assets which are currently free to claim:
- Assets: UI Radial Backgrounds (Assets)
- Assets: Human Skeleton [3D Model] (Assets, Action)
- Assets: Backgrounds Horror (Assets, Survival)
- Assets: Backgrounds of Fruit (Assets, Adventure)
- Assets: UI Mobile #3 (Assets)
- Free Quality Music Samples (Loop, SFX, Music, Speech) (Assets)
- Free Sample Pack of MusicBroz 1 - 4 (Music & Loop & Speech) (Assets)

But I don't know how many people here are interested in itch.io categories other than games.

Well, I'm on itch.io mainly for assets - it's a real time-saver for me to build and test game prototype. I know about other assets you listed but I listed only one because I do not know the answer to your question ("how many people are interested here") and it was the best one / really worth listing.

New claimable freebies:
- 2D Zombie Shooter (Action, Windows/macOS/Linux)
- A Shadow of Thoughts (Adventure/Platformer, Windows/Linux)
- Attack by Air 1 (Action, Windows)
- Apartment13-Redux (Survival/Action/Puzzle/Shooter, Windows)
- Z-Virus Aftermath (Survival/Adventure/Shooter, Windows)
- Kill the Cyborgs3 (Action/Shooter, Windows/macOS/Linux)
- Ragdoll shooter (Action/Adventure/Shooter, Windows)
- Huntsman - Forest Edition V2.0 (Action/Adventure/Shooter/Survival, Windows)
- Crack My Code (Puzzle, Windows/macOS/Linux)
- RottenWood (Survival/Action, Windows)
- DrivingSim2000 (Racing/Adventure, Windows)
- Train Sim- Unity(Demo) (Simulation/Action, Windows)
- Train Climb Simulator - DEMO (Simulation/Racing, Windows)

Although this is not a game some of you still might be interested:
- The PlayStation 2 Encyclopedia (Book)

New claimable freebies:
- Brightful Xmas (Adventure, Windows)

- Dino Island - The Four Crystals: Link.
- The Dark Forest Guardians: Link.
- WW3 Tower Defense: Link.
- Thermo Puzzle: Link. Note: Cannot be claimed.

There are two more non-claimable offers in that sale:
- Clean ATTACK! (Action, Windows, download only)
- GRAVITY Pilot! (Simulation, Windows/macOS/Linux, In development, download only)

New claimable freebies:
- SOLRAID (Shooter/Action, Windows)
- Slither - A Snake Adventure (Action/Adventure, Windows)
- FantasyGolf (Sports, Windows)
- CYBERNETIC MOON HORSE 2071 (Racing, Windows/macOS/Linux, In development)
- G.A.G. GENERIC ASTEROID GAME by Argondevil Guiderods (Simulation, Windows/macOS/Linux, In development)
- Space Shooter (Shooter, Windows/HTML5, In development)
- Shift Shaper (Platformer/Strategy, Windows)
- Unforgiven II : EFTT (DEMO) (MOBILE) (Platformer, Android)
- Lula's Cape (Adventure, Windows, Prototype)
- Bus! Stop! (Action, Windows/macOS, Prototype)
- On A Clear Day (Windows)
- End Matter (Strategy/Simulation, Windows/macOS/Android)

New claimable freebies:
- Plants (Windows/macOS/Linux), ends in less than 3 hours, expired
- Zeko (Puzzle, Windows/macOS/Linux/HTML5), ends in less than 3 hours, expired
- KIWAYA (Shooter, Windows/macOS/Linux/HTML5), ends in less than 3 hours, expired
- Online Retro Tennis (Sports, Windows/macOS/Linux, In development), ends in less than 3 hours, expired
- The Lurking Shadow (Interactive Fiction/Adventure, Windows)

- Antistar: Rising: Link.
GamePlay | Teaser: YouTube.

- A Birdman Emulator: Link.
Gameplay | Teaser: YouTube.

New claimable freebies:
- Xuhivan's Autonomous Cube (Strategy/Card Game/Puzzle/Role Playing, Windows, In development)
- Super Dog Test (Educational, Windows/macOS/HTML5)
- Grim (Platformer, Windows/macOS/Linux)
- Very Hard (Platformer, Windows/macOS/Linux)
- Interplanet Ex (Simulation, Windows)
- Overseas (Windows)
- 2D demon killer kid (Action, Windows/macOS/Linux)
- Warbrush (Action)
- Utopia Process (Action)
- Pyo (Platformer, Windows)
- ROOM.EXE (Adventure, Windows/macOS/Linux/HTML5, In development)
- BouncyBoom (Platformer/Action, Windows)
- Parmesan (Interactive Fiction, HTML5)