Starting from v4.0, SQLyog is available in two editions: SQLyog and SQLyog Enterprise.
SQLyog is free for personal and commercial use.
SQLyog contains all features of SQLyog Enterprise – except the following Power Tools:
* HTTP / SSH Tunneling - Manage MySQL even if your ISP disallows remote connections * Data Synchronization - Zero install MySQL Replication * Schema Synchronization - Keep test and production databases in sync * Notification Services - Send formatted resulsets over email at regular intervals * ODBC Import - Wizard driven painless migration to MySQL
Please visit the following link to view the feature comparison between SQLyog and SQLyog Enterprise: