Megagon Labs (the research arm of Recruit Holdings whose network of companies includes Indeed and Glassdoor) has recently OSS’ed Leam, an integrated analysis environment for exploring, evaluating, and modeling textual data. Leam integrates the paradigm of spreadsheets, computational notebooks, and visualization tools into one system to clean, featurize, visualize, and model textual data. Leam also implements VTA, a visual text algebra, which defines operators to select and transform data; combine operators; and link views and interactions. VTA operators facilitate execution, enable reusability, and afford optimization.