Bibliography on Hilbert's Tenth Problem - Searchable, 400 items. Egyptian Fractions - Lots of information about Egyptian fractions collected by David Eppstein. The Erdos-Strauss Conjecture - The page establishes that the conjecture is true for all integers. Tables and software by Allan Swett. Thue Equations - Definition of the problem and a list of special cases that have been solved, by Clemens Heuberger. Hilbert's Tenth Problem - Statement of the problem in several languages, history of the problem, bibliography and links to related WWW sites. Hilbert's Tenth Problem - Given a Diophantine equation with any number of unknowns and with rational integer coefficients: devise a process, which could determine by a finite number of operations whether the equation is solvable in rational integers. Quadratic Diophantine Equation Solver - Dario Alpern's Java/JavaScript code that solves Diophantine equations of the form Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0 in two selectable modes: "solution only" and "step by step" (or "teach") mode. There is also a link to his description of the solving methods. Diophantine m-tuples - Sets with the property that the product of any two distinct elements is one less than a square. Notes and bibliography by Andrej Dujella. Rational Triangles - Triangles in the Euclidean plane such that all three sides are rational. With tables of Heronian and Pythagorean triples. Rational and Integral Points on Higher-dimensional Varieties - Some of conjectures and open problems, compiled at AIM. Diagonal Quartic Surfaces - Articles, computations and software in Magma and GP by Martin Bright. Linear Diophantine Equations - A web tool for solving Diophantine equations of the form ax + by = c. Pythagorean Triples in JAVA - A JavaScript applet which reads a and gives integer solutions of a^2+b^2 = c^2. Pythagorean Triplets - A Javascript calculator for pythagorean triplets. Pell's Equation - Provides information on this equation, solved by Brahmagupta in 628 AD. Pell's Equation - Record solutions.