Accel-KKR has invested in On Center Software.

On Center, headquartered in the Woodlands, Texas, makes construction automation software.  The investment should help the company grow and broaden the construction automation services it offers. Terms of the investment were not disclosed.

Accel-KKR is a technology-focused private equity firm with more than $2.3 billion in capital under management. The Menlo Park, Calif.-based firm was started in 2000 by private equity firms Accel Partners and Kohlberg Kravis Roberts & Co. LP (NYSE: KKR).  In June, Accel-KKR invested in Zinc Ahead Ltd., a company that provides marketing compliance services to the life sciences industry. In February, the firm picked up Sage Nonprofit Solutions, which provides accounting, donor, fundraising and grant-management services to nonprofit organizations.