1. **SolarMonitor:** Provides real-time and historical solar activity data including active regions, flares, and imagery from various observatories.
2. **SDO Daily Movies:** Offers daily movies of the Sun from SDO instruments like AIA and HMI in multiple wavelengths.
3. **PRADAN (ISSDC):** Indian Space Science Data Center portal for accessing payload data from Indian space missions.
4. **JHelioviewer:** A solar data visualization tool for exploring and analyzing imagery from multiple solar observatories.
5. **SpaceWeatherLive:** Delivers space weather alerts, solar activity forecasts, and geomagnetic storm updates.
6. **FITS Viewer (GSFC):** Web tool to view and inspect FITS format files commonly used in astronomy.
7. **XSPEC (HEASARC):** A spectral fitting software for analyzing X-ray and gamma-ray astronomical data.
8. **CDAW CME Catalog:** Catalog of Coronal Mass Ejections (CMEs) detected by SOHO/LASCO, maintained by CDAW.
9. **SciServer Portal:** Cloud-based platform for big data analysis in astronomy and astrophysics with tools for collaborative research.