diff --git a/Mk/bsd.port.mk b/Mk/bsd.port.mk
--- a/Mk/bsd.port.mk
+++ b/Mk/bsd.port.mk
@@ -2011,6 +2011,8 @@
 .      endif
 .    endif
 
+.include "${PORTSDIR}/Mk/bsd.sponsor.mk"
+
 .    if defined(USE_LOCALE)
 CONFIGURE_ENV+=	LANG=${USE_LOCALE} LC_ALL=${USE_LOCALE}
 MAKE_ENV+=		LANG=${USE_LOCALE} LC_ALL=${USE_LOCALE}
diff --git a/Mk/bsd.sponsor.db.mk b/Mk/bsd.sponsor.db.mk
new file mode 100644
--- /dev/null
+++ b/Mk/bsd.sponsor.db.mk
@@ -0,0 +1,9 @@
+Sponsor_db_Include_MAINTAINER=         portmgr@FreeBSD.org
+
+#
+# bsd.sponsor.db.mk - Sponsorship info database for FreeBSD Ports commiters
+#
+# Please keep descriptions sorted alphabetically by variable name.
+
+arrowd_at_freebsd_org_SPONSORSHIP_PLATFORMS=	CARDANO
+arrowd_at_freebsd_org_CARDANO_SPONSOR_HANDLE=	addr1qy95v6rlgjchrqc7cae9g7vtrmsevdaty8hnl9p5kv0xtajpts7278jw0y9nh9n26y0dfa97j0zkjxxnut8ahg3hs02sth533h
diff --git a/Mk/bsd.sponsor.mk b/Mk/bsd.sponsor.mk
new file mode 100644
--- /dev/null
+++ b/Mk/bsd.sponsor.mk
@@ -0,0 +1,106 @@
+# These variables are used in Ports framework to define the ways to support
+# port maintainers.
+#
+# SPONSORSHIP_PLATFORMS		- List of ways to endorse the port's maintainer
+#				Currently supported values are:
+#				BOOSTY
+#				CARDANO
+#				GITHUB
+#
+#				Each platform may have ":upstream" suffix to allow
+#				sponsoring project's upstream instead of a
+#				downstream maintainer.
+#
+#				To define an additional platform the following
+#				vars should be defined:
+# ${plat}_SPONSOR_HANDLE	- Account name or some other handle for the
+#				  given platform
+# ${plat}_UPSTREAM_SPONSOR_HANDLE	- The same as ${plat}_SPONSOR_HANDLE for
+#					  the ":upstream" case.
+# ${plat}_SPONSOR_URL		- URL leading to the site that allows to make
+#				  to make a donation
+#
+# Variables listed above may be either put into a port's Makefile directly or
+# set automatically based on the MAINTAINER knob value and the data from
+# bsd.sponsor.db.mk
+#
+# An auxiliary "make sponsor" target points the user to appropriate web page.
+# An auxiliary "make sponsor-describe" target prints a machine-readable description
+# of the sponsorship data.
+
+.if !defined(SPONSORMKINCLUDED)
+SPONSORMKINCLUDED=	bsd.sponsor.mk
+
+BOOSTY_SPONSOR_URL=	https://boosty.to/%%HANDLE%%
+CARDANO_SPONSOR_URL=	https://cexplorer.io/address/%%HANDLE%%
+GITHUB_SPONSOR_URL=	https://github.com/sponsors/%%HANDLE%%
+
+GITHUB_SPONSOR_HANDLE?=			${PORTNAME}
+GITHUB_UPSTREAM_SPONSOR_HANDLE?=	${PORTNAME}
+
+.include "${PORTSDIR}/Mk/bsd.sponsor.db.mk"
+_MAINTAINER_KEY=	${MAINTAINER:S/@FreeBSD.org/_at_freebsd_org/:S/@freebsd.org/_at_freebsd_org/}
+.  if defined(${_MAINTAINER_KEY}_SPONSORSHIP_PLATFORMS)
+SPONSORSHIP_PLATFORMS=	${${_MAINTAINER_KEY}_SPONSORSHIP_PLATFORMS}
+.    for plat in ${SPONSORSHIP_PLATFORMS}
+.      if defined(${_MAINTAINER_KEY}_${plat}_SPONSOR_HANDLE)
+${plat}_SPONSOR_HANDLE=	${${_MAINTAINER_KEY}_${plat}_SPONSOR_HANDLE}
+.      endif
+.    endfor
+.  endif
+
+.  for plat in ${SPONSORSHIP_PLATFORMS}
+.    for plat_w_u plat_wo_u in ${plat:S/:upstream/_UPSTREAM/} ${plat:S/:upstream//}
+.      if !defined(${plat_w_u}_SPONSOR_HANDLE) || empty(${plat_w_u}_SPONSOR_HANDLE)
+.error Missing ${plat_w_u}_SPONSOR_HANDLE value
+.      endif
+.      if !defined(${plat_wo_u}_SPONSOR_URL) || empty(${plat_wo_u}_SPONSOR_URL)
+.error Missing ${plat_wo_u}_SPONSOR_URL value
+.      endif
+.    endfor
+.  endfor
+
+SPONSOR_DIALOG=	${DIALOG} --backtitle "Sponsorship options" \
+		--menu "Support options for ${PORTNAME}" 0 0 0
+
+.  for plat in ${SPONSORSHIP_PLATFORMS}
+.    for plat_w_u plat_wo_u in ${plat:S/:upstream/_UPSTREAM/} ${plat:S/:upstream//}
+SPONSOR_DIALOG_ARGS+=	${plat_w_u} ${${plat_wo_u}_SPONSOR_URL:S/%%HANDLE%%/${${plat_w_u}_SPONSOR_HANDLE}/}
+.    endfor
+.  endfor
+SPONSOR_DIALOG_OUTPUT=	/tmp/.SPONSOR_DIALOG_OUTPUT
+_SELECTED_PLATFORM=	${CAT} ${SPONSOR_DIALOG_OUTPUT}
+
+.  if exists(${LOCALBASE}/bin/xdg-open)
+SPONSOR_CMD=	${LOCALBASE}/bin/xdg-open %%URL%%
+.  else
+SPONSOR_CMD=	${ECHO_CMD} To sponsor the maintainer of ${PORTNAME} visit %%URL%%
+.  endif
+
+.  if !empty(SPONSORSHIP_PLATFORMS)
+sponsor:
+	@${RM} ${SPONSOR_DIALOG_OUTPUT}
+	@${SPONSOR_DIALOG} ${SPONSOR_DIALOG_ARGS} 2> ${SPONSOR_DIALOG_OUTPUT}
+
+	@${TEST} -f ${SPONSOR_DIALOG_OUTPUT} && \
+		${SPONSOR_CMD:S/%%URL%%/${${_SELECTED_PLATFORM:sh:S/_UPSTREAM//}_SPONSOR_URL:S/%%HANDLE%%/${${_SELECTED_PLATFORM:sh}_SPONSOR_HANDLE}/}/}
+	@${RM} ${SPONSOR_DIALOG_OUTPUT}
+.  else
+sponsor:
+	@${ECHO_CMD} No sponsorship platforms defined for ${PORTNAME} maintainer
+	@${FALSE}
+.  endif
+
+# The format is
+# distribution-name|maintainer|sponsorship_platform|sponsorship_type|sponsorship_url
+sponsor-describe: ${SPONSORSHIP_PLATFORMS:tl:S/:upstream/-upstream/:S/^/sponsor-describe-/}
+	@${DO_NADA}
+
+.  for plat in ${SPONSORSHIP_PLATFORMS}
+.    for plat_w_u plat_wo_u in ${plat:S/:upstream/_UPSTREAM/} ${plat:S/:upstream//}
+sponsor-describe-${plat:tl:S/:upstream/-upstream/}:
+	@${ECHO_CMD} "${PKGNAME}|${MAINTAINER}|${plat_w_u}|${"${plat_w_u:M*_UPSTREAM}":?Upstream:Maintainer}|${${plat_wo_u}_SPONSOR_URL:S/%%HANDLE%%/${${plat_w_u}_SPONSOR_HANDLE}/}"
+.    endfor
+.  endfor
+
+.endif
diff --git a/ftp/curl/Makefile b/ftp/curl/Makefile
--- a/ftp/curl/Makefile
+++ b/ftp/curl/Makefile
@@ -155,6 +155,8 @@
 ZSTD_CONFIGURE_WITH=	zstd
 ZSTD_LIB_DEPENDS=	libzstd.so:archivers/zstd
 
+SPONSORSHIP_PLATFORMS=	GITHUB:upstream
+
 .include <bsd.port.pre.mk>
 
 .if ((!${PORT_OPTIONS:MGNUTLS} && !${PORT_OPTIONS:MOPENSSL}) || (${PORT_OPTIONS:MOPENSSL} && ${SSL_DEFAULT:Mlibressl*})) && ${PORT_OPTIONS:MTLS_SRP}