User limit: N/A

Redistributable: Sybase partners only

Supported platforms: Linux

URL: www.sybase.com/linux_promo (http://www.sybase.com/linux_promo)

With what began as a simple marketing ploy, Sybase started the free enterprise database revolution with Adaptive Server Enterprise (ASE) Express Edition. Only available for Linux, ASE Express Edition sports similar restrictions to its free competitors. However, the limits apply to each instance of ASE Express Edition so you can run many instances of ASE Express Edition on a machine; in total the individual instances could utilize more than one processor, more than 2GB of RAM, and manage more than 5GB of disk space. Optional support plans, including telephone support and named support contacts, are available from A$2,200 (US$1,680) per year.