This thread finally made it to the sticky level! Hooray!

Here is a list of mods that I found to work on Zen Cart v1.30:

Ask-a-Question v1.3.0 (Marg)
Column Layout Grid v1.3.0 (Rajeev Tandon)
Backup Tool for MySQL Databases (DrByte)
Image Handler 2.0-RC1 (timkroeger)
Google Sitemap with Admin (a_berezin)
GoogleFroogle (a_berezin)
Master Password_encrypt (a_berezin)
RSS2 (a_berezin)
StateSelector (Auto-Populate) 1.3 (a_berezin)
ccByFax 1.3x (made compliant by Merlin - no longer maintained by HiPCTech)
RecoverCartSales 1.4 (no caretaker - available from portali)
Order Steps (Edition 1 and 2) (Hans de Zwart/Ed2 by destra)
SalesReport1.4 (BlindSide - Version 2.0 coming soon)
User Tracking_20060114 (pinghead)
ProperCase (SpeedyG)
AdminLevels 1.3 (made compliant by Dr Byte - update version coming soon from kuroi)
phpMyAdmin Admin integration (ses707)
SEO Assistant 1.1 (no caretaker - PM me if you want a copy).

For support see specific threads for each of the mods in the Contributions forum.

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Seo Assistant_1.1 (Released Jan 12, 2005)
Description:
Admin>Extras>Seo Assistant gives access to seo tools.

1. Tracking of Google & Yahoo page rankings (PR)
2. Tracking of Google & Yahoo keywords & search results
3. Check link popularity
4. Check keyword density

(Uncertain if Yahoo PR functionality works correctly)

Install: Upload files to admin and patch database. No files to modify or override.

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Woody