The Sashimi project hosts the Trans-Proteomic Pipeline (TPP), a mature suite of tools for mass-spec (MS, MS/MS) based proteomics: statistical validation, quantitation, visualization, and converters from raw MS data to the open mzML/mzXML formats.
LabJ-ng is a laboratory notebook for organic chemists. It has a client-server architecture with a web browsers interface. Data is stored on MySQL database. Chemical reactions are drawned in java applet window. See projct website for example.