Hister is basically a full text indexer for websites which saves all the visited pages rendered by your browser. It provides a flexible web (and terminal) search interface & query language to explore previously visited content with ease or quickly fall back to traditional search engines.
I've been using it for more than a month now and as my local index is growing I can avoid opening google/duckduckgo more and more frequently.
The project is still heavily under development with constant fine-tuning, but the current version is in a fairly usable state in my opinion, so I wanted to share it here - perhaps some of you find it useful as well. (Or at least have some constructive criticism =])
The code is AGPLv3 licensed, available at https://github.com/asciimoo/hister
