Smart Diary Suite Portable Free Edition is the best Portable Journal I've found..
Rednotebook lacks too much functionality & easy of use to be a viable replacement.. its difficult to use its bullet system, and it lacks a useful editing toolbar, and its 2 views are a really outdated & non-intuitive way of working
but its the best of the portableapps journals ive found
but I'd love to see a portableapps journal tool like Smart Diary Suite, with a similar Rich text editor supporting graphics & video, and with an easy bullet & indent system, and easy export functions...
even if Rednotebook could simply support Rich Text editing on the top level and have a useful bullet & formatting text & paragraph toolbar ribbon, and support graphics & other media, with a built-in spell checker, it'd be perfect