If you’re looking to reduce the number of SDKs in your app, I’d recommend looking at https://segment.com/

With regards to marketing attribution SDKs specifically, there are a number of tracking tools that aggregate ad-network SDKs in one: https://www.appsflyer.com/; https://www.adjust.com/ but also marketing platforms which offer similar services in exchange of placing your ad spend in their hands: https://www.fiksu.com/.

A caveat: Facebook and Twitter have a limited number of mobile measurement partners, so it’s worth checking which tracking partners are still on the program.

You can check this here for Facebook https://facebookmarketingpartners.com/marketing-partners/ and here for Twitter https://partners.twitter.com/