Apps similar to DXR include Text Sherlock, which is free and open source. Other options are OpenGrok and LXR. In total there are three apps like DXR for Linux, self-hosting, Mac and Windows.
Provides a fast, easy to install and use search engine for text but, mostly for source code. OpenGrok requires to much time to install (though it may be worth it for some). Sherlock will give you a much easier setup, a text indexer, and a web app interface for searching.
OpenGrok is a source code search and cross reference engine. It helps programmers to search, cross-reference and navigate source code trees.
LXR Cross Referencer, usually known as LXR, is a general-purpose source code indexer and cross-referencer that provides web-based browsing of source code, with links to the definition and usage of any identifier.
