Synthclipse
GLSL shader prototyping tool based on Eclipse IDE.
...To install Synthclipse one can download prepacked Eclipse with Synthclipse feature (see "Files" section above) or update an existing Eclipse using the following Update Site: https://kamil-kolaczynski.github.io/synthclipse/update/
Prepacked version has one advantage: it has nice console logs coloring since it shipped with Grep Console plugin ( https://marketplace.eclipse.org/content/grep-console ) that is configured specially for Synthclipse logs.