It should be noted that the IPIP has a range of multi-construct versions that are designed to align with some existing measures.
The Big Five Inventory (BFI)
The BFI is available here in the Appendix of John and Srivastava (1999). Sanjay Srivastava has a page discussing the measure here. (Note the page also directed me to other options I mention below). It is not public domain but it appears to be free for research.
It is a 44 item measure of the Big 5. Each item involves short sentences.
Big 5 Aspects Scale
As Sanjay Srivastava writes:
Colin DeYoung and colleagues have published a 100-item measure, called
the Big Five Aspect Scales (BFAS), which scores not only the Big Five
factors, but also two "aspects" of each. The BFAS is in the public
domain as well.
100 Unipolar Markers
Sanjay Srivastava notes that there is "Lew Goldberg's set of 100
trait-descriptive adjectives" (Goldberg, 1992).
Big 5 Mini Markers
Gerard Saucier reduced [Goldberg's] set to 40 Big Five mini-markers
that have excellent reliability and validity (Saucier, 1994).
More recently, Saucier has developed new trait
marker sets that maximize the orthogonality of the factors (Saucier, 2002). Saucier's mini-markers are in the
HEXACO Personality Inventory-Revised
While the HEXACO is actually based on a six factor model of personality, it does share similarities to the Big 5. Specifically, five of the six dimensions map on to the Big 5, and HEXACO adds honesty-humility.
60 and 100 item versions of the test are available on the website (and 200 item version is available by request).
- Goldberg, L. R. (1992). The development of markers for the Big-Five factor structure. Psychological assessment, 4(1), 26. PDF
- John, O. P., & Srivastava, S. (1999). The Big Five trait taxonomy: History, measurement, and theoretical perspectives. Handbook of personality: Theory and research, 2, 102-138. PDF
- Saucier, G. (1994). Mini-markers: A brief version of Goldberg's unipolar Big-Five markers. Journal of personality assessment, 63(3), 506-516. PDF
- Saucier,G. (2002). Orthogonal markers for orthogonal factors: The case of the Big Five. Journal of Research in Personality, 36(1), 1-31. PDF