Hound
Hound is an extremely fast source code search engine. The core is based on this article (and code) from Russ Cox: Regular expression matching with a trigram index. Hound itself is a static React frontend that talks to a Go backend. The backend keeps an up-to-date index for each repository and answers searches through a minimal API. Currently Hound is only tested on MacOS and CentOS, but it should work on any *nix system. Hound on Windows is not supported but we've heard it compiles and runs just fine (although it helps to to exclude your data folder from Windows Search Indexer).
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Sourcetrail
Sourcetrail is an interactive source explorer that simplifies navigation in existing source code by indexing your code and gathering data about its structure. Sourcetrail then provides a simple interface consisting of three interactive views, each playing a key role in helping you obtain the information you need. Search: Use the search field to quickly find and select indexed symbols in your source code. The autocompletion box will instantly provide an overview of all matching results throughout your codebase. Graph: The graph displays the structure of your source code. It focuses on the currently selected symbol and directly shows all incoming and outgoing dependencies to other symbols. Code: The Code view displays all source locations of the currently selected symbol in a list of code snippets. Clicking on a different source location allows you to change the selection and dig deeper.
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Kooder
Kooder is an open source code search project, offering code, repositories and issues search service for code hosting platforms including Gitee, GitLab and Gitea. There are two modules, gateway and indexer. Gateway is integrated inside gateway under default config.
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Fisheye
Search, track, and visualize code changes. Visualize and report on activity and search for commits, files, revisions, or teammates across SVN, Git, Mercurial, CVS and Perforce. View changes with a side-by-side or unified diff tool and link your Jira Software issues directly to diffs, changeset details, or full source. Get a graphical representation of activity in your source, report on lines of code over time, and get a visual audit trail of changes. Follow what's happening throughout your projects with activity streams showing commits, Jira Software issues, and Crucible review activities across your team. Find code fast with search using any artifact in your code: file names, commit messages, authors, text, and even historical changes. Browse, index, and search all your source from all your source code management systems including SVN, Git, Mercurial, CVS and Perforce – all in one tool. Upgrade your workflow with Jira Software, Bitbucket Server, Bamboo and more.
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