Agent Ransack
Agent Ransack is a free file search tool that can search for files based on many different parameters. I often use it to search a folder and subfolders, invoking it with QAp from the subfolder. Here is how:
Application: C:\Program Files\Mythicsoft\Agent Ransack\AgentRansack.exe
Advanced Settings | Parameters: -d {CUR_LOC}
This will invoke Agent Ransack with the current folder pre-filled as a search location.
There are many other
command-line options you can use to set this up to your taste.
This is especially helpful if you optimize your computer for speed by
disabling Windows indexing. Agent Ransack is very fast and does not rely on resource-heavy indexing to do its thing, unlike Windows Search.