iNaturalist is a free, nonprofit social network for naturalists where users record observations of plants, animals, and fungi, share them with friends and researchers, and get identification suggestions confirmed by a global community. Observations become open data used by scientists and conservationists.
MathNet is a free dataset and benchmark of 30,676 Olympiad-level math problems with solutions, spanning 47 countries, 17 languages and two decades of competitions. It supports problem solving, math-aware retrieval and retrieval-augmented problem solving.
CESDb is the Civil Engineering Software Database, a site founded by engineers that lists free, trial or shareware civil engineering software for engineers, researchers and academics. It is described as currently listing 596 programs under 12 categories, with descriptions, screenshots and manuals where available. Programs can be downloaded for PC, Mac, Linux and other operating systems, and software reviews are provided.
School Yourself provides free interactive online math lessons and videos. Subjects include algebra, geometry, trigonometry, precalculus and calculus. The site states the lessons are free with unlimited access, and describes smart recommendations and personalized assessments.
Frink is a web-based interface for evaluating Frink expressions and performing unit conversions. Expressions are entered in a From box, an optional To box handles conversion, and a lookup box helps find unit names; variables can be set for the session.
Bouncy Balls is a free classroom noise level meter, monitor and management tool. Bouncing balls react to sounds from the microphone. The page states the tool is incompatible with some web browsers and suggests using Chrome or Firefox instead.
Evan Chen's homepage collects course notes, olympiad materials, writings and a CV. The site states that Evan completed a number theory PhD at MIT and coaches math olympiads, and it links to handouts, past problems and solutions for high school students.
Community notes
Be the first to share how this project worked for you.
Sign in with a verified account to leave a review or join the discussion.
Sign in to reviewKeep exploring
MathNet is a free dataset and benchmark of 30,676 Olympiad-level math problems with solutions, spanning 47 countries, 17 languages and two decades of competitions. It supports problem solving, math-aware retrieval and retrieval-augmented problem solving.
CESDb is the Civil Engineering Software Database, a site founded by engineers that lists free, trial or shareware civil engineering software for engineers, researchers and academics. It is described as currently listing 596 programs under 12 categories, with descriptions, screenshots and manuals where available. Programs can be downloaded for PC, Mac, Linux and other operating systems, and software reviews are provided.
School Yourself provides free interactive online math lessons and videos. Subjects include algebra, geometry, trigonometry, precalculus and calculus. The site states the lessons are free with unlimited access, and describes smart recommendations and personalized assessments.
Frink is a web-based interface for evaluating Frink expressions and performing unit conversions. Expressions are entered in a From box, an optional To box handles conversion, and a lookup box helps find unit names; variables can be set for the session.
Bouncy Balls is a free classroom noise level meter, monitor and management tool. Bouncing balls react to sounds from the microphone. The page states the tool is incompatible with some web browsers and suggests using Chrome or Firefox instead.
Evan Chen's homepage collects course notes, olympiad materials, writings and a CV. The site states that Evan completed a number theory PhD at MIT and coaches math olympiads, and it links to handouts, past problems and solutions for high school students.
