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To learn more about a program, click on its icon. To download a program, click on your platform (Classic Macintosh or Windows). Some other versions (for older platforms) are available at the bottom.
Mathematics
Polyhedron Poly 1.12  (more info)
explore polyhedra

Classic Macintosh (PowerPC, System 7.1.2 to MacOS 9.2) 853K alternate site
Windows (Windows 2000, XP, Vista, and Windows 7) 592K alternate site
Rendered polyhedron made with Geofix pieces Poly Pro 1.12  (more info)
Poly + export DXF, STL, and 3DMF models

Classic Macintosh (PowerPC, System 7.1.2 to MacOS 9.2) 858K alternate site
Windows (Windows 2000, XP, Vista, and Windows 7) 597K alternate site
Graph of two shaded, overlapping relations GrafEq 2.13  (more info)
graph equations and inequalities

Classic Macintosh (PowerPC, System 7.1.2 to MacOS 9.2) 2M alternate site
Windows (Windows 2000, XP, Vista, and Windows 7) 1.4M alternate site
Tessellation Tess 1.75  (more info)
explore tessellations and other symmetric illustrations

Classic Macintosh (PowerPC, System 7.1.2 to MacOS 9.2) 1.2M alternate site
Windows (Windows 2000, XP, Vista, and Windows 7) 834K alternate site

(Illustration, from our 2004 Tess Contest: Snowflakes, by Erin Lee.)

Graphics
Under construction tessellation A Smaller GIF 1.22  (more info)
compress animated GIFs

Classic Macintosh (PowerPC, System 7.1.2 to MacOS 9.2) 447K alternate site
Windows (Windows 95 to Windows XP) 1M alternate site

note: without registration, A Smaller GIF only reports file savings and expires after 30 days

Under construction tessellation COGS 1.01  (more info)
batch compress animated GIFs

Classic Macintosh (PowerPC, System 7.1.2 to MacOS 9.2) 308K alternate site
Windows (Windows 95 to Windows XP) 949K alternate site

note: without registration, COGS only reports file savings and expires after 30 days

A moving window shown with ghost trails Gif·gIf·giF  (more info)
record animated GIFs

Classic Macintosh (PowerPC, System 7.1.2 to MacOS 9.2, version 1.53) 463K alternate site
Windows (Windows 95 to Windows XP, version 1.24) 1M alternate site

note: without registration, Gif·gIf·giF includes a credit line and expires after 30 days

Older Software & Platforms
Power Macintosh
itsagif 0.96 Classic Macintosh (PowerPC, System 7.1.2 to MacOS 9.2) 749K alternate site  (more info)
680x0 Macintosh
Poly 1.09 Macintosh (68020+, System 7 to MacOS 8.1) 705K alternate site
Poly Pro 1.09 Macintosh (68020+, System 7 to MacOS 8.1) 721K alternate site
GrafEq 1.15 Macintosh (System 6.0.5 to MacOS 8.1) 149K alternate site
GrafEq 2.11 Macintosh (68020+, System 7 to MacOS 8.1) 1.9M alternate site
Tess 1.41 Macintosh (68020+, System 7 to MacOS 8.1) 429K alternate site
A Smaller GIF 1.22 Macintosh (68020+, System 7 to MacOS 8.1) 447K alternate site
Gif·gIf·giF 1.53 Macintosh (68020+, System 6.0.5 to MacOS 8.1) 433K alternate site
itsagif 0.96 Macintosh (68020+, System 6.0.5 to MacOS 8.1) 703K alternate site  (more info)
iTime 1.03 Macintosh system extension (68020+, System 7 to MacOS 9.2) 49K alternate site  (more info)
NETime 1.00 Macintosh system extension (68020+, System 7 to MacOS 9.2) 49K alternate site  (more info)
Windows 95 or later
Poly 1.11 Windows 646K alternate site
Poly Pro 1.11 Windows 674K alternate site
GrafEq 2.12 Windows 2.3M alternate site
Tess 1.74 Windows 822K alternate site
itsagif 0.95 Windows 1.3M alternate site  (more info)
Windows 3.1/3.11 with win32s
Poly 1.07 Windows 1.2M alternate site
Tess 1.05 Windows 1M alternate site
A Smaller GIF 1.22 Windows 1M alternate site
Gif·gIf·giF 1.24 Windows 1M alternate site
itsagif 0.95 Windows 1.3M alternate site  (more info)