Version Checker Mod 1.8, 1.7.10, 1.7.2 is a mod that will show updates for mods in an easy list. This mod currently add version checkers which will spit out a bunch of text to the chatbox at startup of a game, which gets cluttered very quickly.
This mod will add a small button at the main menu when it detects an outdated mod. The number represents the number of found outdated mods.