These are other proposals that have been brought to the UTC and delegated to the Symbols Subcommittee. (Thanks to Karl Pentzlin for providing the initial list.) Some have been discussed on the mailing list to a degree, but these have not progressed yet beyond that, unless otherwise noted.
From UTC #111 (May 2007):
Proposal to encode a separate block of Flags for all non-private-use ISO 3166-1 two-letter codes:
2008-08-11: L2/08-305 Some suggestions about the encoding of national flags as requested by the Emoji proposal (L2/08-081)
Alchemy
2009-01-26: L2/09-037 Proposal for Alchemical Symbol for Symbols in Unicode 2008-08-12: L2/08-313 Toward a Proposal for an Alchemy Unicode Plane 2009-01-22: L2/09-021 Proposal to encode two heavy low quotes for German in the UCS Dingbats block 2009-01-26: L2/09-034 Proposal to encode a German trademark symbol in the UCS |