SNITCH (bayeSian iNference given emIssion and absorpTion features of quenChing Histories) performs Bayesian inference of star formation histories using measured emission and absorption spectral features. The code ingests equivalent widths and spectral indices (e.g., EW[Hα], Dₙ4000, Hβ, Hδₐ, Mg Fe′) and, via a pre-computed look-up table generated with FSPS models, returns posterior estimates of parameters such as metallicity, quenching time and quenching rate. It uses emcee (ascl:1303.002) to explore parameter space, produces diagnostic plots of MCMC walkers and corner plots, and is configurable to suit custom spectral parameter sets and lookup-table ranges. Designed for application to integrated‐light or IFU galaxy spectra, SNITCH enables flexible adaptation for a variety of star‐formation-history studies.

nGIST (new Galaxy Integral-field Spectroscopy Tool) analyzes modern galaxy integral field spectroscopic (IFS) data. Borne out of the need for a robust but flexible analysis pipeline for an influx of MUSE and other galaxy IFS data, the code is the continuation of the archived GIST pipeline (ascl:1907.025). It improves memory and parallelization management and deals better with longer optical wavelength ranges and sky residuals that are particularly problematic at redder wavelengths (>7000 Angstrom). Performance improvements include memory and parallelization optimization, and smaller and more convenient output files. nGIST can create continuum-only cubes and offers better handling of cube variance and better bias estimation for stellar kinematics, and includes a pPXF-based emission line fitter and an updated version of Mapviewer for a quick-look interface to view results.