pyFileSearcher was designed to be lightweight, easy to use, but capable of handling a large volume of files tool. A tool that I personally could use on large corporate servers to find out - which files have taken all my space in the last few days? It's free, it's opensource, it's for linux and windows.
The program is written in Python 3 using the Qt5.
A fast and resource-efficient graphical file search tool
A Python/Tk gui for find and grep.
FindEmAll is, compared with other similar file search tools, fast and resource-efficient and independent from any desktop environment (no Gnome or KDE libraries required).
Nucular Archiving System for creating full text indices for fielded data. Python API, web, and command line interfaces. Fast. Very light weight. Concurrent read/writes with no possible locking issues. No server process. Proximity. Facets. Funny name.
Universal information crawler is a fast precise and reliable Internet crawler. Uicrawler is a program/automated script which browses the World Wide Web in a methodical, automated manner and creates the index of documents that it accesses.