Version 3.0 of the Java application Easik has been released. Previous versions were announced on this list. Easik is a graphical environment for database design based on the finite limit, finite sum Entity-Attribute (EA) sketches, and also for data entry and manipulation. EA sketches are the syntactic basis of the categorical Sketch Data Model developed by the poster and Michael Johnson. The model extends and considerably enhances the widely studied and implemented Entity-Relationship-Attribute data model. Easik supports graphical design of EA sketches and their export to SQL database schemas. An exported schema has triggers and procedures which enforce the graphically specified constraints, both finite limit and finite sum. Views built from subschemas may be designed and implemented. Easik also provides connectivity for data manipulation to the common open-source database management system MySQL. Version 3.0 contains the functionality of Version 2.0 and adds several new view features. Most importantly, views can now implement constraints from the supporting EA sketch. Some known safe view updates are permitted, and are restricted in other cases. Constraint handling has been tested and refined. The application is available at http://mathcs.mta.ca/research/rosebrugh/Easik or follow the link from http://www.mta.ca/~rrosebru/ Downloads include: - user instructions - an executable Java archive (jar) file - Java source code - example designs The contributors to Easik are Robert Fletcher, Kevin Green, Vera Ranieri, Jason Rhinelander, Andrew Wood, Christian Fiddick, Sarah VanderLaan, Federico Mora and Robert Rosebrugh. We acknowledge support from NSERC Canada and Mount Allison University. Extensive information about the Sketch Data Model is in articles available from the web pages of the poster and Michael Johnson. Comments and user reports are very welcome. Bob Rosebrugh [For admin and other information see: http://www.mta.ca/~cat-dist/ ]