Apps similar to ureadahead include e4rat, which is free and open source. Other options are Sreadahead. Between them they cover Linux.
e4rat ("Ext4 - Reducing Access Times") is a toolset to accelerate the boot process as well as application startups. Through physical file realloction e4rat eliminates both seek times and rotational delays. This leads to a high disk transfer rate.
Sreadahead is a daemon that reads data sequential by use from disk. This is typically used to fetch information needed by the boot process into memory as early as possible. Sreadahead thereby eliminates IO wait times during the boot process which results in a faster startup.
