Collection of articles and online books, by Paul Marmet; topics include the death of Big Bang cosmology, how classical mechanics can explain the effects commonly attributed to relativity, how the Lorentz transformations mean that the speed of light is not the same for all inertial observers, and gravitational length contraction.

An alternative theory of gravity that is based on the equivalence principle. Developed by Unified Gravity Corporation, which is concerned with approaches to alternative energy.

Introduces a new theory in relativistic physics to replace Einstein's special and general theories of relativity. Also includes the Millennium Theory of Inertia and Gravity, and a text on breaking the light speed barrier. By Joseph A. Rybczyk.

Elementary Concepts of Material World (the attempt to "explain fundamental laws of nature with use of precise and clear logic only") and criticism of the Lorentz transformations; by Aleksandar Vukelja.

A novel treatment of the idea of the transformations of motion (instead of space-time) and of the derivation of the mass-formation (genesis) formula that supports the ideas of continuous mass-formation, continuous creation of worlds, hierarchical worlds, and even of gods begetting gods.

Presents a brief "theoretical proof that would strongly suggest that the [special theory of relativity] is fundamentally flawed"; by Greg Alexander.

Introducing a "universe much smaller than the big bang", in which the multitude of galaxies turns out to be an optical illusion; includes pages inviting the reader to consider how Einstein can be disproved using the Hubble Space Telescope.

A theory of everything and a mathematical formulation of a philosophy, from the basis of physical reality to self-organization, consciousness, and the future of the Universe; by M. Erk Durgun.

Alternative to relativity based on a dragged ether. Includes an exposition on the equivalence of magnetic and kinetic energy and the derivation of Planck's constant from quantum mechanics and the ether. Translation from a book in Dutch by Johan Bakker.

Attempt to formulate special relativity using Aristotle space-time and interpreting the relativistic boost invariance of any phenomenon which satisfies this symmetry is interpreted as an intrinsic property of this phenomenon rather than a very property of space-time itself, the theory is shown to be compatible with causal links between space-like separated events; by Bernard Chaverondier.

Presents the principal axioms of the "extinction shift principle", a purely classical photon-gravity theory of emissions/re-emissions of electromagnetism and gravitation intended as an alternative to both general and special relativity. By Edward Henry Dowdye, Jr.

A physics treatise presenting a new model of spatial dynamics, based on a little known interpretation of Einstein's equivalence principle and the fundamental conclusion that all point-energy in the universe is expanding; by Francis Pedley

Texts describing a particular Euclidean interpretation of special relativity, including a proposed geometric unification of electromagnetism and gravity (in five dimensions), information on Euclidean versus Minkowski four-vectors, and a sketch of the Universe as a multi-dimensional fractal; by R.F.J. van Linden.

Essay explaining the postulates of relativity, the secret essence of time, spaces, and matter, and proposing the elimination of internal contradictions of special relativity; by Alexander Poshelaev. Also shows how the energy contained in the parallel spaces proposed by the author could be used to solve the current energy crisis. Article explains postulates of relativity, secret essence of time, spaces, matter.

A downloadable book featuring a critical analysis of special relativity, from coordinate transformations to the question of antimatter and a new elementary particle called the ELPOTRIN. Author Milan R. Pavlovic. [English and Serbian]

Essay by James Constant arguing how Einstein's equivalence postulate should be abandoned for the study of spacelike wave phenomena and gravitation. Contains links to other essays by the author, notably about Newton's Gravitation and its relation to Riemannian geometry and to cosmology.

Essay by Amrit Srecko Sorli on space, time, and the atemporal gravitational field as a "direct gravitational medium between massive objects".

Link to paper (PDF) with a weak-field derivation of gravitational waves to quadrupole order in the Brans-Dicke scalar-tensor and Rosen bi-metric theories of gravity, including a comparison with general relativity. By Warren F. Davis.

A collection of published and presented papers on the subject of relativity theory prepared by Curt Renshaw, including the author's radiation continuum of light, the restoration of space and time, and a look at three-dimensional Galilean invariance.

Lays out the authors doubts about relativity, using light propagation scenarios, reference frames, and phenomena such as aberration.

Webpages of the Society for the Advancement of Autodynamics, a theory that is meant to replace Einstein's theory of special relativity. Includes general material such as "Autodynamics in pictures", links, and information about the society.

Critical examination of stellar aberration and its relativistic interpretation, followed by the author's alternative derivation based on Euclidean spacetime; by Rajan Dogra.

Website presenting what the author claims to be experimental evidence against relativity, as well as more philosophical arguments and proposed explanations of the various experimental effects in terms of an ether theory. Includes a discussion board.