U-Compare and Argo are natural language processing (NLP) platforms that allow users to create workflows with NLP components and annotate documents. U-Compare is an integrated text mining and NLP system based on UIMA that includes 50 pre-loaded components and tools for comparing annotations and evaluating results. Argo is a web-based system that supports remote processing and interactive annotation for collaborating users of varying expertise levels. Both systems provide visualizations and allow customization of component parameters and workflows.