collectd, a data collection service that monitors, by polling or pushed updates, system information, such as temperature or free RAM. kcollectd provides a graphical display of these collected statistics.
More generally, kcollectd can display the data stored in any round-robin database (RRD). Use the
--basedir command line option to load RRDs from a non-standard location.
kcollectd development is managed on GitLab. The source code can be found there, and is signed with my gpg key. Please file bugs there or by emailing KCollectd Bug Reports.
Pre-built packages are available in Debian testing and downstream distributions.