Battery Monitor (batmon)
Monitor battery status

BOINC Manager
Configure or monitor a BOINC core client

Gastman
Graphical Asterisk Console
whowatch
console, interactive, process and users monitoring tool
Logs
View detailed event logs for the system
Power Statistics
Observe power management
GNOME System Monitor
View current processes and monitor system state

GSmartControl
Monitor and control SMART data on hard disk and solid-state drives
Isag System Activity Grapher
Interactive System Activity Grapher for sysstat

KNutClient
Client for NUT

KSystemLog
System log viewer tool
MATE System Monitor
View current processes and monitor system state

Log File Viewer
View or monitor system log files
MGM System Monitor
A highly configurable, very gaudy system load meter
Mtink
Status monitor for Epson inkjet printers

OpenJDK 9 Monitoring & Management Console 9.0.1.11-4.fc26.x86_64-debug
Monitor and manage OpenJDK applications for 9.0.1.11-4.fc26.x86_64-debug

nagstamon
Nagios status monitor

Phoronix Test Suite
An Automated, Open-Source Testing Framework
Psensor
Psensor is a graphical temperature monitor for Linux

qps
Qt application to display and manage running processes

OpenJDK 8 Monitoring & Management Console 1.8.0.161-5.b14.fc28.x86_64-debug
Monitor and manage OpenJDK applications for 1.8.0.161-5.b14.fc28.x86_64-debug

OpenJDK Monitoring & Management Console x86_64-2.6.17.1.el7_6
Monitor and manage OpenJDK applications for x86_64-2.6.17.1.el7_6

TCOS Server Configurator
Configure TCOS server daemons and users

TCOS Standalone
Configure standalone mode of TCOS

TcosMonitor
Thin client network monitor
TimeMon
CPU time usage monitor for GNUstep
WMiFS
Complete network monitoring dockapp

OpenJDK 8 Monitoring & Management Console 1.8.0.144-7.b01.fc27.x86_64-debug
Monitor and manage OpenJDK applications for 1.8.0.144-7.b01.fc27.x86_64-debug
System Monitor
View current processes and monitor system state

NmapSI4 - User mode
Is a Qt5 interface for nmap scanner
Print Queue Applet
System tray icon for managing print jobs

APCUPSD Monitor
Gtk/GUI Monitor program for (U)ninterruptible (P)ower (S)upply under the management of the APCUPSD.sourceforge.net package, also available at gapcmon.sourceforge.net

OpenJDK 9 Monitoring & Management Console 9.0.4.11-6.fc28.x86_64
Monitor and manage OpenJDK applications for 9.0.4.11-6.fc28.x86_64

OpenJDK 9 Monitoring & Management Console 9.0.1.11-4.fc27.x86_64-debug
Monitor and manage OpenJDK applications for 9.0.1.11-4.fc27.x86_64-debug

OpenJDK 8 Monitoring & Management Console 1.8.0.161-5.b14.fc26.x86_64-debug
Monitor and manage OpenJDK applications for 1.8.0.161-5.b14.fc26.x86_64-debug

OpenJDK 8 Monitoring & Management Console 1.8.0.161-0.b14.el7_4.x86_64-debug
Monitor and manage OpenJDK applications for 1.8.0.161-0.b14.el7_4.x86_64-debug

OpenJDK 8 Monitoring & Management Console 1.8.0.151-5.b12.el7_4.x86_64-debug
Monitor and manage OpenJDK applications for 1.8.0.151-5.b12.el7_4.x86_64-debug

OpenJDK 8 Monitoring & Management Console 1.8.0.161-0.b14.fc26.x86_64-debug
Monitor and manage OpenJDK applications for 1.8.0.161-0.b14.fc26.x86_64-debug

Thermal Monitor
Displays current temperature readings on a graph
Mtinkc
Status monitor for Epson inkjet printers
Tor monitor
Status monitor for Tor routers
wmhdplop
A hard drive monitor dockapp for Window Maker
Wireshark (GTK+)
Network traffic analyzer