Linkek

TeX:

LaTeX Search Engine

LaTeX diff (With 'clip < file.tex' you can copy contents of a file to clipboard on Windows)

PDF diff

LaTeX to html converter

DeTeXify

Create LaTeX tables

Edit Tikz source codes

Create (Bib)TeX from titles

Databases:

On-Line Encyclopedia of Integer Sequences (Sloane) Superseeker

Basic Definitions of Complexity Classes

Theorems of the 21st century

MathFiction

Combinatorics Video Collection by Igor Pak

Conferences:

Combinatorics Conferences

TCS Events

Acceptance ratio of TCS Conferences

János Pach's schedule

Academics:

Erdős number and collaboration distance

Mathjobs

Me on:

Google Scholar

MathSciNet

zbMATH

Scopus

DBLP

Research Gate

Mathematics Genealogy Project

MathOverflow

CSTheory Stackexchange