First Ajima-Malfatti Point
Animated illustration. Adobe Flash.

Second Ajima-Malfatti Point
Interactive illustration. Adobe Flash.

Apollonius' Problem for Three Circles Interactive illustration.
Adobe Flash.

Equal Incircles Theorem. Interactive. Adobe Flash.

Eyeball Theorem: Animated Angle to Geometry Study.  Adobe Flash.

Lemoine Theorem
Interactive illustration. Adobe Flash.

Butterfly Theorem

Miquel's Pentagram Theorem Interactive proof with animation and key theorems.
Adobe Flash. 

Morley's Triangle & Center: with interactive animation and manipulation.
Adobe Flash.

Nagel Point Theorem. Proof.
Triangle and excircles. Animation. 
Adobe Flash.

Nine-Point Center, Nine-Point Circle, Euler Line (English version).
Circumcenter, Centroid, Orthocenter.
Adobe Flash.
Interactive illustration.

Seven Circles Theorem. Animation.
Adobe Flash.

Semiperimeter and incircle

Semiperimeter and excircles of a triangle

Semiperimeter, incircle and excircles of a triangle

Gergonne Point Theorem

Ceva's Theorem. Concurrency. Interactive proof with animation. Key concept: Menelaus Theorem. 

Menelaus' Theorem. Interactive proof with animation and key concepts..

Johnson's Theorem

Simson Line. Animation, Proof.
Adobe Flash.

Angle between two Simson Lines

Sangaku Problem

The Bevan Point

Clifford's Circle Chain Theorems

Kurschak's Tile and Theorem