This website is dedicated to the development, dissemination and discussion of journal indicators. Such indicators are being developed to assess the quality and impact of scholarly journals within the scientific community. The pioneeering one is the journal impact factor developed by Eugene Garfield at the Institute for Scientific Information (ISI), nowadays Thomson Reuters. Recently, the Centre for Science and Technology Studies (CWTS) of Leiden University developed for Elsevier Scopus an indicator called the source normalized impact per paper (SNIP, see Moed, 2009). This indicator can be seen as an important alternative to the impact factor. More information is available in the Documentation section. Currently, the SNIP is being produced by CWTS exclusively for Scopus.