Although the equations are usually made: Islamic esotericism = Sufism, and Judaic esotericism = Kabbalah; this is not always correct. To refer to all Islamic esotericism as "Sufism" is like referring to all modern unconventional non-materialistic and non-mainstream religious ideas as "New Age". Just as there are unconventional ideas that are neither non-materialistic, mainstream religious, or "New Age", so there are forms of esotericism within the Islamic world that are not the same as, or even related to, "Sufism".
The concept of the Perfect Man in Ismaili Islam
The Imaginal World
Ikhwanus Safa - The Epistles of Brethren of Purity