| hessianx | Insight II Dynamics Trajectory History Data |
| hessianx | Insight II Hessian Data |
| hessianx | Insight II Layout Template Data |
| hessianx | Insight II Torsion Data |
| het | PLINK Method-of-moments F Coefficient Estimates Data |
| heu | Adobe Flash Player Cache Metadata |
| hevbs | HippoEDIT VB Script |
| hewsp | HippoEDIT Workspace |
| hex | BinHex Encoded Data |
| hex | WOW! Diagnostic HEX Data |
| hexbook | HHD Hex Editor Bookmarks Data |
| hexhis | Hex Editor Neo History Data |
| hexlic | Hex Editor Neo License Data |
| hexpatch | Free Hex Editor Neo Patch |
| hexsel | Hex Editor Neo Selection Data |
| hf2 | L3DT Compressed Heightfield Data |
| hfe | Altair FEKO Magnetic Field Strengths Data |
| hff | L3DT Heightfield Data |
| hfg | HeroForge-Anew Character Data |
| hfo | Pinnacle Hollywood FX Object |
| hfx | Harvard Graphics F/X Data |
| hfx | Hot Fax Data |
| hfx | Pinnacle Hollywood FX Effects Data |
| hfz | L3DT Compressed Heightfield Data |
| hgc | PC Fold Data |
| hgc | Zeus 5.0 Physical Data |
| hgc1 | eXtendable Wad Editor HGC1 Data |
| hgdata | Altair HyperGraph Data |
| hge | Hulixerian Game Engine Data |
| hgf | HomeGauge Form File |
