In this poster, we present multiple tools to simulate, reduce, and analyze JWST data. We developed NIRCCoS, a NIRCam coronagraphy image simulator based on the powerful pyNRC package, as well as spaceKLIP, which enables using pyKLIP PSF subtraction for JWST NIRCam and MIRI images. Furthermore, we developed a kernel phase stage 3 pipeline for JWST NIRCam and NIRISS data which can be interfaced in the same way as the official JWST stage 3 pipelines for e.g. coronagraphy and the fouriever toolkit, which enables analysis of various kinds of interferometric data.