LesvePhotometry is a freeware photometry tool developed by Belgian amateur astronomer Pierre de Ponthierre, owner of DPP Observatory. It is a very powerful software that produces photometric reduction files in a/o the AAVSO file format (allowing you to directly upload your observations to the AAVSO International database), and in the CBA (Center for Backyard Astrophysics) format. For more information, see the LesvePhotometry website.