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port2pkg: Convert from a FreeBSD port to a NetBSD package http://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/pkgtools/port2pkg/
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rpm2pkg: Convert RPM archives to NetBSD packages http://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/pkgtools/rpm2pkg/
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url2pkg: Tool to automate initial steps in building a package http://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/pkgtools/url2pkg/