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The Virus Encyclopedia is a Wikidot wiki that anyone can edit, currently holding hundreds of entries about computer viruses and worms. It covers viruses, worms and related malware, with pages on individual threats and groups, plus help pages about entry layout and wiki syntax. A featured entry describes the Navidad mass-mailer worm.
The Tree Proof Generator is a web tool that accepts formulas of standard propositional, predicate or modal logic and tries to find either a countermodel or a tree proof, also called a semantic tableau. It supports classical propositional logic, first-order predicate logic with functions and identity, and a few normal modal logics.
Philosophy Stack Exchange is a question-and-answer site for those interested in the fundamental nature of knowledge, reality, and existence. It is part of Stack Overflow's open communities, and the help center documents asking, answering, reputation, moderation, badges and review queues.
WildWinds is a reference and attribution resource for ancient numismatics, covering Roman, Greek, Byzantine and Celtic coins. Coins in its database are not offered for sale on the site. The site provides a database of coin types with attributions and references.
The Stanford Encyclopedia of Philosophy organizes scholars from around the world in philosophy and related disciplines to create and maintain an up-to-date reference work. It offers a table of contents, archives and random entry browsing, with editorial information and citation guidance.
Ekvis is an educational website offering quiz games for learning geography and languages. It describes itself as a low-profit philanthropic project with interactive map games covering countries, capitals, flags and regions. Games are free to play, require no registration and collect no personal information; the site says it is intended for individual and classroom use.
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The Virus Encyclopedia is a Wikidot wiki that anyone can edit, currently holding hundreds of entries about computer viruses and worms. It covers viruses, worms and related malware, with pages on individual threats and groups, plus help pages about entry layout and wiki syntax. A featured entry describes the Navidad mass-mailer worm.
The Tree Proof Generator is a web tool that accepts formulas of standard propositional, predicate or modal logic and tries to find either a countermodel or a tree proof, also called a semantic tableau. It supports classical propositional logic, first-order predicate logic with functions and identity, and a few normal modal logics.
Philosophy Stack Exchange is a question-and-answer site for those interested in the fundamental nature of knowledge, reality, and existence. It is part of Stack Overflow's open communities, and the help center documents asking, answering, reputation, moderation, badges and review queues.
WildWinds is a reference and attribution resource for ancient numismatics, covering Roman, Greek, Byzantine and Celtic coins. Coins in its database are not offered for sale on the site. The site provides a database of coin types with attributions and references.
The Stanford Encyclopedia of Philosophy organizes scholars from around the world in philosophy and related disciplines to create and maintain an up-to-date reference work. It offers a table of contents, archives and random entry browsing, with editorial information and citation guidance.
Ekvis is an educational website offering quiz games for learning geography and languages. It describes itself as a low-profit philanthropic project with interactive map games covering countries, capitals, flags and regions. Games are free to play, require no registration and collect no personal information; the site says it is intended for individual and classroom use.
