Yes, it's true you aren't dreaming, I've decided to revive SteamItemManager.
The new version is available now (the website hasn't been updated yet, but the archive and the autoupdater are) !

It has been rewritten from scratch, so not all features from the old version are available (yet) and there are many bugs remaining but at least this one is working.

Features :
- View your backpack
- Move, drop, craft, equip your items
- Autocraft duplicates weapons for metal
- Log incoming items into a file (with timestamp)
- New UI (finally got rid of the vgui)

Update:

- Added the Gibus n° if you gained it through the Steamcommunity site.

Update:

-Fixed the descriptions of the 2 new Halloween items