Submit portable freeware that you find here. It helps if you include information like description, extraction instruction, Unicode support, whether it writes to the registry, and so on.
Kiwix allows to read Wikipedia offline. In addition, using the highly efficient ZIM file format (http://www.openzim.org), Kiwix can read any HTML content offline. In order to enjoy Wikipedia offline, you need to download Kiwix and a ZIM file of Wikipedia (from the Kiwix web-site or directly from the Kiwix internal library).
Then you can surf in Wikipedia as if you were online. Kiwix provides almost everything you will need:
Case and diacritics insensitive full text search engine
Bookmarks & Notes
ZIM based HTTP server
PDF/HTML export
Localized in more than 80 languages
Search suggestions
Tabs navigation
Integrated content manager/downloader
Really why the question? As this application is not listed in the database nor posted in the forums is not an application update. Does it look like a discussion thread because of the extra bottom links?
Did you notice the PortableApps Kiwix 0.9rc2 Development Test 1? It creates two emtpy folders in AppData and AppData/Local Settings, which as I recap is pretty much accepted here. Configuration files are stored under Data in Application folder.
Did you notice that you did not submit Kiwix Portable but Kiwix? Also, the download links provided (Sourceforge and Softpedia) in the OP are for a non-portable versions of Kiwix. So, which one is it, smart ass?
"Download Wikipedia using BitTorrent" ... only 42 gigs!
Fortunately an English-only version was available for 1.75 gigs inside the tool. I do obviously wish there were more resources than Wikipedia archives, but it's definitely the baseline. If there was a tool like this without Wikipedia, that would be my first feature request.