LIXA, LIbre XA, is a free and open source XA transaction manager
...The client/server architecture of LIXA allows many application containers to share a single LIXA (state) server: this is ideal when horizontal scalability is a must and many identical application containers must refer to a single transactional environment.
LIXA can be used with the C, C++, Java, Python and COBOL programming languages.
Extended Server Pages (XSP/XSPD) for UNIX or Linux, C-based
XSP/XSPD high performance session based web application server for C/C++, Java and shell-scripts, requires UNIX/Linux based operating system, development of application programs like JSP's in C/C++, Java and/or shell scripts within same session context.
XappServer is an application server designed to make it easier for web application development in C++. If you are familiar with Java servlets, glassfish, and/or jboss, the learning curve in developing on XappServer should be shorter.
Project Insight offers powerful tools for project managers and teams in order to deliver optimal performance and ensure success. An enterprise project and portfolio management software, Project Insight offers personalized dashboards, intelligent scheduling, resource management, collaboration, time and expense tracking, project and portfolio tracking, workflow, and reporting features to help teams work better and get real results. Project Insight is suitable for small teams, mid-market companies, and large enterprises.
Photon provides very fast access to data containers (queues, maps, etc.) in shared memory - it can retrieve millions of data records per second. It also uses some RDB concepts like transactions and crash recovery. See web site for details.