Apache Drill vs Screwdriver: What are the differences?
Apache Drill: Schema-Free SQL Query Engine for Hadoop and NoSQL. Apache Drill is a distributed MPP query layer that supports SQL and alternative query languages against NoSQL and Hadoop data storage systems. It was inspired in part by Google's Dremel; Screwdriver: Yahoo's Continuous Delivery Build System for Dynamic Infrastructure. Screwdriver is an open source build platform designed for Continuous Delivery.
Apache Drill belongs to "Database Tools" category of the tech stack, while Screwdriver can be primarily classified under "Continuous Integration".
"NoSQL and Hadoop" is the primary reason why developers consider Apache Drill over the competitors, whereas "Free open source" was stated as the key factor in picking Screwdriver.
Screwdriver is an open source tool with 705 GitHub stars and 109 GitHub forks. Here's a link to Screwdriver's open source repository on GitHub.