- Classical Logic - Introduction to classical logic, including completeness and Löwenheim-Skolem theorems; by Stewart Shapiro.
- Computability Logic Homepage - Main online source on computability logic - a recently emerged formal theory of computational tasks and resources. Maintained by G.Japaridze.
- Introduction to Mathematical Logic - Hyper-textbook for students by V. Detlovs and K. Podnieks.
- Mathematical Logic and Foundations - From The Mathematical Atlas, a resource of mathematics maintained by David Rusin. Extensive resources related to logic and set theory.
- Mind Versus Goedel by Damjan Bojadziev - Compares the mind to advanced computers and artificial intelligence, as Goedel would possibly view them.
- Category Theory@ (35)
- Computability (9)
- Computational Logic (31)
- Foundations (5)
- Game Semantics (13)
- History (89)
