I was saddened to read in the INFORMS news that Paul Jensen passed away last week. I met Paul at the 2010 Informs conference where he gave a great talk about his set of OR and MS teaching add-ins for Excel. (See also these supplements.) We also corresponded about OpenSolver. You can read about Paul’s contributions at his University of Textas site; his obituary is available here. Just as PuLP has been picked up and supported by Stuart Mitchell after its creator passed away, I hope that someone will pick up the maintenance of Paul’s Excel tools; they are a great online legacy which deserve a life beyond that of their creator.