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The science-quality products that the pipelines produce are found in Level 2, 2.5, 3. PACS have also created products that can be downloaded as a tarball of FITS files from the HSA directly, to be read into HIPE or into any other software: these are called the Standalone Browse Products. For photometry these are simply the most highly recommended maps for different modes. For spectroscopy they are slightly modified version of one of the set of Level 2/2.5 cubes, and an additional set of tables.
The term "standalone browse" means that the products have a format that allows them to be loaded into other software fairly easily and are a good example of the data the observation has produced. For photometry the standalone products are also science products that can be used for any type of observation. For spectroscopy they are science-level cubes but modified in one important way: in order to make the cubes easier to read into other software it was necessary to modify the wavelength grid to make it equidistant. This changes the slightly.
As well as being able to download the standalone products from the HSA directly, you can find them in any ObservationContext produced by SPG 13 and higher. When looking at an observation in HIPE with the Observation viewer (double-click on the observation as listed in the Variables panel, the viewer will open in the Editor panel), you can find the standalone browse products in the "directory" listing in the Data section of the viewer,
Photometry: in the entry called browseProduct. These are in fact links to the maps as held in the final Level of the ObservationContext.
Spectroscopy: in the entry called browseProduct which are also links to the final levels: 2, 2.5, and 3.
An additional useful product you can find in an ObservationContext viewed in HIPE is the pacsObsSummary. This lists, in a friendly manner, the details of the observation (who, what, how). This information is not provided in the tarball, however, as it is built on-the-fly within HIPE.