web geometry deals with foliations in general position. in the planar case and the complex setting, a $d$-web is given by the generic family of integral curves of an analytic or an algebraic differential equation \textit{f(x,y,y')=0} with y'-degree $d$. invariants of these configurations as abelian relations (related to abel's addition theorem), lie symmetries or godbillon-vey sequences are investigated. this viewpoint enlarges the qualitative study of differential equations and their moduli. in the nonsingular case and through the singularities, cartan-spencer and meromorphic connections methods will be used. basic examples will be given from different domains including classic algebraic geometry and wdvv-equations. standard results and open problems will be mentioned. illustration of the interplay between differential and algebraic geometry, new results will be presented.