Hello,
it depends on what you want to analyze.
In case you want to analyze results only in plan view, BlueKenue is great with a fast workflow. For analyzing velocity distributions in cross sections, think e.g. of secondary currents and so on, Paraview, the commercial software Tecplot or Python are great. In the forum category Scripts you will find Python tutorials how to parse Telemac files and visualizing them.
Hope this helps,
Clemens