There are multiple Galaxies with different toolsets and you can also run your own Galaxy with any tools youw want. You can see the list of public servers with topics of interest: https://wiki.galaxyproject.org/PublicGalaxyServers
If you want to set up your Galaxy with your toolset see http://getgalaxy.org
Most of the tools are nowadays installed from the Tool Shed. It contains about 3500 tools. If you want to browse the list see https://toolshed.g2.bx.psu.edu/ and find repository you are interested at (repository also has description) - click on Valid tools and click on the name of the tool, you will see description/help provided by the tool author.