Platypus - Realtime server monitoring and reporting
strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
perf - Perf is a simple app monitoring solution paired with meaningful alerts.
Monitornator - Server monitoring made simple
ltrace - ltrace intercepts and records dynamic library calls which are called by an executed process and the...