
More and more remarkable social networks for games are rising, offering a great variety of features to help developers maximize the revenue of their game by increasing retention, engagement and virality. Yet, most of us only know about Facebook.
To make it easier, we have created a list reviewing 10 Unity SDKs and their features:

Platforms: iOS, Android, Web |
Built-in Facebook Connect: Yes |
Plug-ins Support: All |
Example Game: Candy Crush Saga |
Known Model: Free |
Offers Monetization: Using FB ad network |
Key Features: Facebook connect, share, invite, requests |
White Labeled: Yes |
Download Facebook Unity SDK

Platforms: iOS, Android |
Built-in Facebook Connect: Yes |
Plug-ins Support: Unity, Cocos2d-x, LibGdx, ANE, GameMaker |
Example Game: Safari Party |
Known Model: Free (ads) |
Offers Monetization: Select developers |
Key Features: Facebook connect , friend invitation via Twitter / Whatsapp / iMessage / Hangout and more, chat & messages, sync / async challenges, stream, multiplayer, adding other players as friends, leaderboards, search |
White Labeled: No |
Download Nextpeer Unity SDK

Platforms: iOS, Android |
Built-in Facebook Connect: No |
Plug-ins Support: Unity, Cocos2d-x, LibGdx, Corona, Marmalade, GameMaker |
Example Game: Fruit Ninja Free |
Known Model: Free |
Offers Monetization: No |
Key Features:
Achievements, leaderboards, real-time multiplayer, turn based multiplayer |
White Labeled: No |
Download Google play Unity SDK

Platforms: iOS, Android |
Built-in Facebook Connect: Yes |
Plug-ins Support: Unity, Cocos2d-x, ANE |
Example Game: The Crossing Dead |
Known Model: Free (ads) |
Offers Monetization: Unity ads |
Key Features: Video sharing, following players, discussions |
White Labeled: No |
Download Everyplay Unity SDK

Platforms: iOS , Android , Windows Phone |
Built-in Facebook Connect: Yes |
Plug-ins Support: Unity and Cocos2d-x |
Example Game: Guess the Character |
Known Model: Free |
Offers Monetization:
Select Developers |
Key Features: Connect, share status, like, upload image, get friends, get feed, invite. Unified API across Facebook, Twitter, and Google+. Integrations with Game Center and Google Play Game Services coming soon. |
White Labeled: No |
Download SOOMLA Unity SDK

Platforms: iOS, Android |
Built-in Facebook Connect: Yes |
Plug-ins Support: Unity, Cocos2d-x, Unreal |
Example Game: My Talking Tom |
Known Model: Free |
Offers Monetization: No |
Key Features: Achievements, leaderboards, real-time multiplayer, turn based multiplayer |
White Labeled: No |
Download Kamcord Unity SDK

Platforms: iOS |
Built-in Facebook Connect: No |
Plug-ins Support: All |
Example Game: Fruit Ninja Free |
Known Model: Free |
Offers Monetization: No |
Key Features: Achievements, leaderboards, real-time multiplayer, turn based multiplayer |
White Labeled: No |
Download Apple Unity SDK

Platforms: iOS, Android, Web |
Built-in Facebook Connect: Yes |
Plug-ins Support: Unity |
Example Game: N/A |
Known Model: Paid |
Offers Monetization: No |
Key Features: Friend invite, share, chat, leaderboard |
White Labeled: Yes |
Download GetSocial Unity SDK

Platforms: iOS, Android |
Built-in Facebook Connect: Yes |
Plug-ins Support: Unity |
Example Game: Pixelated – The Pixel Color Puzzle |
Known Model: Paid |
Offers Monetization: No |
Key Features: Share, invite, web dashboard |
White Labeled: Yes |
Download Socialize Unity SDK

Platforms: iOS, Android |
Built-in Facebook Connect: No |
Plug-ins Support: All |
Example Game: N/A |
Known Model: Free |
Offers Monetization: No |
Key Features: Share, invite followers |
White Labeled: Yes |
Download Twitter Unity SDK
Each SDK offers something different and depending on what social features you want will determine which SDK is the right one for your game.