I clicked "Top left black Apps" > "Find more apps", then typed "timewrap", but I have got zero results.
I know how to install from timewrap_24.tgz. Why can't I get it from "Find more apps"?
Arte you on Splunk 6.3.x ? If so, it will not be listed because it is not officially a Splunk 6.3 App. Try searching for keyword
in your Splunk and it will list 2 Apps, where as on apps.splunk.com it will list 13 Apps. So your Splunk instance will only list apps which are listed for your version on apps.splunk.com 🙂