Compiled libraries for Windows: These could save you time when trying to link your C/C++ program to common scientific libraries.
CorrTrack: Particle tracking software with GUI. Useful to track a few colloids in a movie quickly and with subpixel resolution.
xiFastMovie: Ximea camera recorder designed to take big and fast movies.
Bibfrompdfs: A quick and dirty script to fetch BibTeX bibliographic data from a folder of PDF articles. Good for quickly adding a lot of new PDFs to your BibTeX database.
Science outreach
Here is a website about science for high school kids that I created recently (in French!)...