The goal of Plomo is to develop new meta tools to improve and bring synergy in the existing infrastructure of Pharo1 (for software development) and the Moose software analysis platform2 (for maintenance). PLOMO will (i) enhance the Opal open compiler infrastructure to support plugin definition, (ii) offer an infrastructure for change and event tracking as well as models to compose and manipulate them, (iii) work on a layered library of algorithms for the Mondrian visualization engine of Moose, (iv) work on new ways of profiling applications. All the efforts will be performed on Pharo and Moose, two platforms heavily used by the RMoD and Pleiad teams.