Alexandre Stefanov has long maintained a list of online math texts and other materials at Geocities; this material has now been moved to 110MB Hosting. Because these resources may be of interest to our readers, we present here a modified version of Stefanov's list as of November 18, 2009.

Classical Analysis

• Homeomorphisms in Analysis, by Casper Goffman, Togo Nishiura, and Daniel Waterman
• Why the Boundary of a Round Drop Becomes a Curve of Order Four, by A. N. Varchenko and P. I. Etingof
• Lectures on Entire Functions, by B. Ya. Levin
• Constructive Real Numbers and Constructive Function Spaces, by N. A. Sanin
• Complex Variables, by Robert B. Ash and W.P. Novinger
• Foundations of Nonstandard Analysis, by Erland Gadde
• Analytic functions, by Stanislaw Saks, Antoni Zygmund
• Theory of Functions of real variable, by Shlomo Sternberg

Functional Analysis

• Functional Analysis, by Douglas N. Arnold
• Paul Garrett's lecture notes
• Functional Analysis (3rd year) lecture notes, by Thomas Ward
• Functional Analysis and Semi-Groups, by Einar Hille
• The Convenient Setting of Global Analysis, by Andreas Kriegl and Peter W. Michor, AMS 1997, 618pp
• Hilbert Space Methods for Partial Differential Equations, by R.E. Showalter
• Monotone Operators in Banach Space and Nonlinear Partial Differential Equations, by R. E. Showalter
• Harmonic Analysis and Partial Differential Equations, by Björn E.J. Dahlberg and Carlos E. Kenig
• Harmonic Function Theory, by Sheldon Axler, Paul Bourdon, and Wade Ramey (printing disabled)
• An Introduction to C*-Algebras, by Pierre de la Harpe and Vaughan Jones
• Functional Analysis, by Dr. P. G. Dixon
• Introduction to Microlocal Analysis, by Richard Melrose
• Bernoulli Periodic distributions, Notes by Miguel Lerma
• Holomorphic Methods in Analysis and Mathematical Physics, by Brian C. Hall

Differential Equations

• Nonlinear Analysis and Ordinary Differential Equations, by Klaus Schmitt
• Ordinary Differential Equations and Dynamical Systems, by Gerald Teschl
• Ordinary Differential Equations Notes, by Sheldon Newhouse
• Partial Differential Equations, by William W. Symes
• Lectures on analytic differential equations, by Yulij Ilyashenko and Sergei Yakovenko
• Exterior Differential Systems and Euler-Lagrange Partial Differential Equations, by Robert L. Bryant, Phillip A. Griffiths, Daniel A. Grossman
• Monograph on quasilinear partial differential equations, by Marco Squassina