He advocated for ICCF Holland, a non-governmental organization supporting AIDS victims in Uganda, and used the popularity of Vim to encourage donations.
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Moolenaar was an advocate of ICCF Holland, a non-governmental organization based in Kibaale, Uganda which he founded to support children whose parents have died of AIDS. In 1994, he volunteered as a water and sanitation engineer for the Kibaale Children's Centre; he made several return trips over the following twenty-five years. In 1995, he made Vim charityware. An estimated US$2,000 was raised for ICCF Holland in 1997, followed by US$4,000 a year later. In 1999, donation income totaled approximately US$7,000. He last visited the Kibaale Community Centre in 2020 before the COVID-19 pandemic. Following Bram's passing in 2023, ICCF Holland transferred all activities to its sister charity Kuwasha in Canada and dissolved at the end of 2025.