iPython, numpy/scipy/matplotlib, Pandas, Git, Bash, Sublime Text 2, Vim, RStudio, R, ggplot2. I spend a lot of time working on remote computer clusters (SGE and LS) from a 13 inch MacBook Pro. Spectacle.app and Alfred.app are invaluable with screen space at a premium. I save my work/pipelines in Evernote and write documentation in Markdown with Marked.app.
