Free textbooks in topology

• Textbook in Problems on Elementary Topology by O.Ya.Viro, O.A.Ivanov, V.M.Kharlamov and N.Y.Netsvetaev unfinished
• Topology Course Lecture Notes by Aisling McCluskey and Brian McMaster
• Topology lecture notes(3rd year) by Thomas Ward

Algebraic Topology

• Allen Hatcher's homepage has a (nearly complete) textbook.
• Cohomology, Connections, Curvature and Characteristic Classes by David Mond
• Introduction to Characteritic Classes and Index Theory by Jean-Pierre Schneiders
• Algebraic Topology by Allen Hatcher.
• Algebraic Topology by Solomon Lefschetz, AMS 1942, 389 pp.
• Abstract group theory and topology articles by Walter Neumann