This is a totally unofficial list that I put together myself over on the Glorantha G+ group. So details may be wrong but a lot of this has been officially confirmed (e.g. that the product is planned, though not when it will be released).
I thought I'd share it here, for fun and info.
HeroQuest: Glorantha
The Dragonrise, the “offstage” material from The Eleven Lights, for HQG - Ian Cooper
Fonrit setting book for HQG - Ian Cooper
RuneQuest: Roleplaying in Glorantha (RQG)
RuneQuest Starter Set
Gods & Goddesses of Glorantha - 100 long cult write-ups (two volumes)
RuneQuest scenarios book – a collection of brand-new scenarios
The Red Book of Magic - every Rune and spirit magic spell of any cult of any size in Genertela
Glorantha Quickstart booklet - 48-page booklet, free PDF
RuneQuest Campaign Book (formerly GM's Book)
RuneQuest Dragon Pass Campaign (possibly a separate Adventures book?)
Pegasus Plateau - very-short adventures, combats, situations, locations, etc. Intended to be drop-in content for, e.g. "an hour of play after a full session of char-gen," or "need a substantive NPC here, quick," or the like
The Smoking Ruins - scenario book
Pavis & Big Rubble - by Robin Laws
Barbarian Town campaign pack - by Sarah Newton
Nochet guidebook - Harald Smith
HeroQuest publications
Non-Gloranthan HQ genre packs - Ian Cooper
HeroQuest SRD and "Quest Worlds" OGL core book - Ian Cooper
Other Glorantha publications - rule system TBD
Casino Town/Holy Country book
Trollpack vol 1 ("troll info and adventures for humans") - Dan McCluskey
Trollpack vol 2 ("everything you need to run troll PCs in a trollish setting with a campaign based around trollish clan life") - Dan McCluskey
Trollpack vol 3 ("covering Dagori Inkarth with a full description of Redstone, and takes the campaign literally from 'tussle over a cave' into creative heroquesting, PC heroes stomping around like a chit in the DP wargame, and climaxes with one of the defining magical events of the Hero Wars") - Dan McCluskey
Dragon Pass - remodelled version of the classic board game, via Kickstarter - Chris Klug
Riders of the Storm: Nomads of the Wastelands (Praxpak) - David Scott
Gloranthan Adventures 3 - Defending the Dark (from D101) - Newt Newport
Apple Lane (PDF available now)
Snake Pipe Hollow (PDF available now)
Cults of Prax (PDF available now)
Cults of Terror (PDF available now)
Plunder (PDF available now)
Runemasters (PDF available now)
Griffin Mountain (PDF available now)
Soloquest Collection (PDF available now)
Borderlands (PDF available now)
RuneQuest Companion (PDF available now)
Pavis (PDF available now)