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.
TreeDBNotes is a free powerful and easy-to-use personal database program, PIM and Word Processor with Tree Structure, advanced encryption and password protection. Features: Search, Replace, Case options, Insert file/ link/ image/ time/ date/ symbols/ table / html table. Import from txt, wri, rtf, Excell, Word, html and more. Export to txt, html, wri, doc and more.
TreeDBNotes stores and represents your information in a comfortable and clear tree-structured form. Each node in such 'tree' represents associated note, so you can store a lot of mostly independent notes in one notebook. With any note you can perform main Wordpad-like text-formatting functions (font and paragraph styles).
Indeed use the universal extrator method. Settings are saved in the application folder in a file called options.ini. I found no entries in the registry although i didn't use regshot or something like that . Also no entries in the user directory.
Application looks nice but the freeware version is no longer under development.
TreeDBNotes Free is now at version 3.3. It is no longer compatible with 1.0's version of .tdb files, and I question its portability. Anyhow, the old method of installation is no longer applicable to the new version.
Edit: The application does allow you to import old database files from previous versions
It's a nice application, but it's no longer portable. There are folders created in the user directory (application data and my documents)
I could not find a workaround.
On the website you can also find a "free" registered version with more features, but you have to donate $ 19,95
Free versus "free, but registered" : http://www.mytreedb.com/free_vs_pro.html
TreeDBNotes appears to have been abandoned and the webpage has fallen in dereliction (and SPAM) -- yet it still has the Pro version available for download.
The Internet Archive has plenty snapshots of the site but it seems the last version archived is the one posted to the database (v4.34.1). E.g., see: