IXAS, checks whether the schema and/or records between two different databases are the same or not. This program is able to generate a SQL script that merges down differences found. Because its based on AdoDB, it is (or will be) able to work in many DBMS
MiHiSync is a script extension for mBot plugin in Miranda IM. This extension allows you to backup your contact history on remote webserver. It also contains a webUI for the history.