The SIGCHI Student Travel Grant (SSTG) program is intended to enable students who lack other funding opportunities to attend SIGCHI-sponsored or co-sponsored conferences. This travel grant is intended to support students whose intention is to present at a SIGCHI-sponsored conference, not just attend.
More details can be found here

In recognition of Gary Marsden’s contributions and inspiration in HCI4D, ACM SIGCHI established the Gary Marsden Student Development Fund to support growth of HCI in developing worlds by sponsoring postgraduate students to attend SIGCHI sponsored conferences.
Eligible students: postgraduate students (Master or PhD degree) from and currently based in developing countries who have accepted contributions or are volunteering for ISS 2017.
More details can be found here