Here's the GitHub repository for documentation and the download for Tom Rettig's powerful envLib library, which I modernized and maintain for VFP 9.

This version of MsgSvc has all the functionality of the one found in the INTL Toolkit except for the multilingual features. MSGSVC.ZIP (Public Domain).

A class browser add-in that allows you to extract a component and all its parents and children into a single VCX for sharing purposes.

Audits and reports all occurrences of many potential localization problems in your application. For example, the DEFINE PAD menu command has PROMPT, FONT, KEY, and MESSAGE clauses, all of which tend to be hard-coded. Gotchas will report the exact locations of all occurrences of DEFINE PAD, and dozens of other commands and functions. Even if you don't use the intl toolkit, this utility will tell you where some of your international coding problems may lie. GOTCHAS.ZIP Version 1 (10k, April 4 1995).