a16z has the following classification for Web3 projects

1、web3 Applications

2、Decentralized Autonomous Organizations (DAOs)

3、Decentralized Finance (DeFi)

4、Stablecoins & Central Bank Digital Currencies (CBDCs)

5、Privacy & Digital Infrastructure

6、The Creator Economy

7、Blockchain-based Games

web3 covers a wide range of projects, the following are organized for Social related areas

zero

Zero is a distributed Social Operating System for Web3. It enables communication, collaboration, financial transactions and onchain governance to occur directly between content-creators, developers, and users (hereinafter referred to as Members), independent of third parties
Official Website:https://www.zero.tech/
Twitter:https://mobile.twitter.com/zero__tech

BlackHoleDAO

BlackHoleDAO is a decentralized asset management protocol based on DAO governance. "BlackHole DAO Protocol (BHDP)" is a brand new standardized model constructed based on DeFi 3.0.
Official Website:https://blackholedao.finance/#/
Twitter:https://twitter.com/BlackHoleDAO_
DISCORD:https://discord.gg/VqjyGMZ6FA

Islands

Your passport for the metaverse, and where web3 communities live on the internet.
Official Website:https://islands.xyz/signup
Twitter:https://twitter.com/IslandsXYZ

Akasha

Akasha is a blockchain based decentralized social media network.
Official Website:https://akasha.world/
Twitter:https://twitter.com/AKASHAworld

Orbis

Web3 Twitter
Official Website:https://orbis.club/

Wall

Explore, discover and showcase your web3 world with WALL. Follow trends and activities in the NFT and DAO space and discover web3.
Official Website:https://www.wall.app/
Twitter:https://twitter.com/walldotapp?ref_src=twsrc^google|twcamp^serp|twgr^author

LeoFinance

LeoFinance is a social platform where users get paid for creating, upvoting and interacting with crypto and finance content.
Official Website:https://leofinance.io/
Twitter:https://twitter.com/financeleo

superfandom

On Superfandom, creators issue special NFTs to their superfans, going beyond digital art or collectibles. These NFTs are like tickets, or passes, that enable real-world and virtual experiences with creators. It's a new way for creators to cultivate their fandoms.
Official Website:https://superfandom.io/
Twitter:https://twitter.com/superfandom_nft/

MadRealities

the world’s first interactive dating show  where the community decides what happens (and who happens).
Official Website:https://www.madrealities.xyz/
Twitter: https://twitter.com/madrealities

Barracuda

Raise funds & manage your community all in one place. Create community tokens, fundraise projects, and enable community driven decision making with easy-to-use governance.
Official Website:https://www.barracuda.io/

GM

Our immediate goal is to make creating and managing a DAO or crypto-asset community as easy as spinning up a subreddit. Longer-term, we hope to build the first crypto-native, decentralized, and user-owned social network.
Official Website:https://gm.xyz/

Mask

Encrypt your posts & chats on social networks Allow only your friends to decrypt.
Official Website:https://mask.io/
Twitter:https://twitter.com/realMaskNetwork

Ideamarket

Ideamarket is a decentralized market built on Ethereum that allows the public to measure the value of information without relying on third parties. If Bitcoin is money without banks, Ideamarket is credibility without corporations.
Official Website: https://ideamarket.io/
Twitter:https://twitter.com/ideamarket_io

SO-COL

SO-COL is a platform where creators and fans can connect like never before. We are the bridge between your web2 social channels and the shiny new web3.
Official Website: https://www.socol.io/
Twitter: https://twitter.com/socol_io

Ecency

Decentralized, rewarding, true ownership social network
Official Website: https://ecency.com/
Twitter: https://twitter.com/ecency_official

Minds

Free your mind and get paid for creating content, driving traffic and referring friends. A place to have open conversations and bring people together.
Official Website: https://www.minds.com/
Twitter: https://twitter.com/minds

Wumbo

Wumbo is a Browser Extension that sits on top of Twitter and lets you mint tokens for your favorite creators. Build a thriving community and join them on their journey to the top!
Official Website:https://wum.bo/
Twitter:https://twitter.com/TeamWumbo

Prysm

Prysm is the social ownership platform. Make new friends, squad up and own NFTs together.
Official Website: https://beta.prysm.xyz/home
Twitter: https://twitter.com/prysm_xyz

Charmverse

First native Web3 all-in-one workspace - tasks, docs, and more. Membership management for DAOs.
Official Website:https://www.charmverse.io/
Twitter: https://twitter.com/charmverse

Gatekeeper

Token gating IRL events experiences
Official Website: https://www.fwb.help/join
Twitter:https://twitter.com/FWBtweets

Fanaply

Fanaply creates official NFTs for the biggest names in sports, music, and entertainment. We let you celebrate your favorite milestones, memories, and achievements with a permanent record and share them with your friends.
Official Website: https://fanaply.com/
Twitter: https://twitter.com/fanaply

Bonfire

Create a custom web3-native home, powered by your social token & NFTs
Official Website: https://www.trybonfire.xyz/
Twitter: https://twitter.com/bonfire_tweets

Backdrop

The platform for web3 communities. Backdrop helps you discover, get notified about, and participate in tokenized communities that resonate with who you are.
Official Website: https://backdrop.so/
Twitter: https://twitter.com/withBackdrop

Peuple

The first rewarding socialFi network
Official Website: https://wearelepeuple.org/
Twitter: https://twitter.com/PeupleApp

Torum

A Comprehensive and Scalable Crypto Social Media Platform
Official Website: https://intro.torum.com/
Twitter: https://twitter.com/torum_official

Phaver

Share-to-earn decentralised social app. Share, curate & earn tokens.
Official Website: https://phaver.com/
Twitter: https://twitter.com/phaverapp

Beem

Web3 interactive video streaming for creators, communities & brands.
Official Website: https://www.beem.xyz/
Twitter: https://twitter.com/beemxyz

Portify

Portify is a one-stop #SocialFi platform on the Binance smart chain with multi-chain DeFi integration.
Official Website: https://portify.app/
Twitter:https://twitter.com/PortifyOfficial

Pravica

A unified communication suite that meets WEB 3.0 standards and uses Blockchain technology to empower user privacy and security.
Official Website: https://pravica.io/
Twitter: https://twitter.com/pravicasuite

Secretum

Solana blockchain based messaging and OTC trading app where every conversation is private by design.
Official Website: https://secretum.io/
Twitter: https://twitter.com/appsecretum

ComingChat

Integration of Social Privacy, Digital Wallets, Digital Identity, NFT Authoring Platform, and DApp Middleware for the metaverse.
Official Website:https://www.coming.chat/
Twitter: https://twitter.com/ComingChatApp

Session

Session is an end-to-end encrypted messenger that minimises sensitive metadata, designed and built for people who want absolute privacy and freedom from any form of surveillance.
Official Website: https://getsession.org/
Twitter: https://twitter.com/session_app

MessageParty

Message Party is on a mission to reimagine the most basic digital tool we use - the chat app - to allow everyone to talk to their friends the web3 way.
Official Website: https://www.messageparty.com/
Twitter:https://twitter.com/messagepartyapp

Alter

ALTER is a private & secure messaging app built on on the Secret Network using blockchain Technology.
Official Website: https://altermail.live/
Twitter: https://twitter.com/AlterDapp

huddle01

One-click Meetings in your Metaversical. Login with Web3, create token-gated spaces, use NFT avatars and decentralized storage.
Official Website:https://huddle01.com/
Twitter: https://twitter.com/huddle01_

metafabric

First web3 social network for BAYC and other NFT holders.
Official Website: https://metafabric.io/
Twitter: https://twitter.com/meta_fabric

Commonwealth

Commonwealth is an all-in-one platform for on-chain communities to discuss, vote, and fund projects together. Never miss an on-chain event, proposal, or important discussion again.
Official Website:https://commonwealth.im/
Twitter: https://twitter.com/hicommonwealth

Dialect

Dialect is giving wallets a secure way to communicate, & protocol developers the tooling to extend that messaging, & send their users opt-in, privacy-preserving push notifications, right to their phones.
Official Website:https://www.dialect.to/
Twitter: https://twitter.com/saydialect

comm

Web3 discord: Communities in Comm are like servers in Discord.
Official Website: https://comm.app/

SPKZ

Web3 Community Platform Protocol. Unlike other message boards, every message is signed with a wallet. With SPKZ, tokens and wallets are the new social graph.
Official Website: https://spkz.io/
Twitter: https://twitter.com/SPKZ_io

Sylo

Sylo provides an incentivised node network where any wallet address can communicate with any other wallet address, NFT owner, or Smart Contract participant without any reliance on a centralised party.
Official Website: https://sylo.io/
Twitter: https://twitter.com/sylo

Profile

A web3 decentralized identity to communicate your personal story and build communities with crypto, NFTs, and users you can trust
Official Website: https://www.profile.site/
Twitter: https://twitter.com/tryProfile

Signet

Messaging app
Official Website: https://www.signetapi.xyz/

XMTP

The communication protocol and network for web3 and crypto.
Official Website: https://xmtp.com/
Twitter: https://twitter.com/xmtp_

Mirror

The essential web3 toolkit for sharing and funding anything. From writing about your latest idea, to building a home for the next big DAO.
Official Website: https://mirror.xyz/
Twitter: https://twitter.com/viamirror

Sigle

Decentralised and open-source Web 3.0 writing platform.
Official Website: https://www.sigle.io/
Twitter: https://twitter.com/sigleapp

Cortex

A decentralized notebook, web3 publishing tool, and wallet in one.
Official Website: https://www.crtx.app/
Twitter:https://twitter.com/app_cortex

Papyrus

Papyrus is a platform that allows creators to publish content-developed blogs and web3-native newsletters for communities
Official Website: https://papyrus.so/
Twitter: https://twitter.com/papyrus_xyz

VersoView

VersoView is the first decentralized Web3 engage-to-earn social media publishing platform.
Official Website: https://versoview.com/
Twitter: https://twitter.com/VersoView

Cyberconnect

Building the social graph infrastructure for Web 3
Official Website: https://cyberconnect.me/
Twitter:https://twitter.com/CyberConnectHQ

Lens protocol

A permissionless, composable, & decentralized social graph that makes building a Web3 social platform easy.
Official Website: https://lens.dev/
Twitter: https://twitter.com/LensProtocol

Mem protocol

Mem's building tools for the social layer of web3.
Official Website: https://mem.co/
Twitter: https://twitter.com/memprotocol

Boomerang

Boomerang provides a one-stop-shop for your community management needs. We track and connect interactions across web3 platforms, enabling you to find and reward your most active community members.
Official Website: https://www.tryboomerang.io/
Twitter: https://twitter.com/tryboomerang

kryptosign

The first ever end-to-end crypto document platform.
Official Website: https://www.kryptosign.io/
Twitter: https://twitter.com/kryptosign_io

glowlabs

Reward For loyalty, Give back to your community
Official Website: https://glowlabs.io/
Twitter: https://twitter.com/glowlabsxyz

underdogprotocol

Underdog Protocol allows you to launch your own Career Token and build a team of early believers.
Official Website: https://underdogprotocol.com/
Twitter: https://twitter.com/intent/follow?screen_name=UnderdogWagmi

Snapshot

Snapshot is a decentralized voting system. It provides flexibility on how voting power is calculated for a vote. Snapshot supports various voting types to cater to the needs of organizations. Creating proposals and voting on Snapshot is user-friendly and does not cost gas as the process is performed off-chain.
Official Website: https://snapshot.org/#/

Vocdoni

Open-source blockchain voting protocol that is scalable, auditable, censorship-resistant & anonymous-capable.
Official Website: https://vocdoni.app/
Twitter: https://twitter.com/vocdoni

Beyond

o-code Web3 Toolkit for Communities. Beyond helps community builders become web3 enabled in seconds.
Official Website: https://beyond.so/

Juicebox

Build a community around a project, fund it, and program its spending. Light enough for a group of friends, powerful enough for a global network of anons.
Official Website: https://juicebox.money/#/
Twitter: https://twitter.com/juiceboxETH

Guild

Token gating; Community management platform.
Official Website: https://guild.xyz/
Twitter: https://twitter.com/guildxyz

Calcom

The open source Calendly alternative. You are in charge of your own data, workflow and appearance.
Official Website: https://cal.com/
Twitter: https://twitter.com/calcom

UniPass

UniPass is multi-chain unified crypto identity and your universal passport to crypto world and metaverse.
Official Website: https://www.unipass.id/
Twitter: https://twitter.com/UniPassID