finding datasets for test purpose

I am looking for datasets that serve as test samples for my work. I need a dataset of objects and each object is defined by a set of features. I dag in google but couldn't find useful links. can any one guide me to a source where I can find such datasets. To better illustrate: I need datasets conceptually looking like the following no matter what are the formats (like json,csv,excel ... etc)

Object-1 : feature1,feature2,feature3 ... ,featuren
Object-2 : feature1,feature2,feature3 ... ,featuren
Object-3 : feature1,feature2,feature3 ... ,featuren