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searchcode.com
searchcode is a free source code and documentation search engine. API documentation, code snippets and open source (free sofware) repositories are indexed and searchable.
Koders is a syntax-specific (33 languages, soon to be 43) open source code search engine that enables developers to find, understand, and use open source code.
Koders is a syntaxspecific (33 languages, soon to be 43) open source code search engine that enables developers to find, understand, and use open source code. Koders has a search index of several billion lines of code, and will further expand this to include the extensive project list on ohloh.net.
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Discontinued search-tool search-engine developer-tools code-search coders