13) DiskUsage Want to see at a glance precisely which applications are using up all the space on your phone's internal memory or SD Card? DiskUsage gives you an easy visual representation, and as an added benefit it acts as a file manager for your SD Card.
14) Speedtest.net Speed Test This app benchmarks the speed of your mobile network. It provides both download and upload speeds.
15) aTrackDog Have trouble remembering to check for updates to your apps? aTrackDog finds the newest version of all your apps, even ones not listed on the Android Market, and notifies you when they're available. It allows you to open, uninstall and manage your apps, and even tracks your uninstalled apps.
16) CPU Benchmark Use this app to test the speed of your Android phone's processor. This is a great tool for testing the results of overclocking your phone.
17) Vlingo Need to text, call, tweet or set your Facebook status and your hands are already occupied? That's no problem if you have Vlingo, which allows you to operate your Android phone with your voice. It even works with a wireless Bluetooth headset.
18) iTrackMMA Stay on top of all your favorite MMA promotions with this app. It allows you to track upcoming UFC, Strikeforce, WEC, DREAM and MFC events, with full fight cards and even betting lines. The developer is working on a news feature that will provide real-time news from all the major MMA feeds.
19) Pickup Sports Looking to get in quick game of hoops or a little football? Pickup Sports, the grand prize winner in the Snaptic Move Your App! Developer Challenge, helps you find nearby pickup games of basketball, football, soccer, tennis and other sports. You can even find pickup running partners and workout buddies. The developer plans to add badminton, racquetball and yoga to the next update.
20) B.iCycle B.iCycle is a cyclometer for your phone. It tells you your current speed, average speed, maximum speed, total distance, trip distance, current altitude, climbed altitude, burned calories and trip time. It also includes maps and you can watch your bike move along the trail as you pedal.
Disk Usage Android app
21) Congress Android App Are you a political junkie? This open source app from Sunlight Labs lets you keep track of the latest bills before Congress. It also lets you keep track of your national legislators' actions, including positions, bills sponsored, even their Twitter updates and YouTube videos.
23) Seesmic This Twitter client integrates streams from Twitter, Facebook and even Salesforce.com Chatter into a single client, allowing you to stay on top of all your messages from various sources. Unlike many clients, it supports multiple accounts, giving you the ability when composing a message to send it out via one of your accounts or all of them at once. You can also customize a large number of features.
24) aCar This app allows you to track the maintenance, fuel mileage and expenses of your vehicles. It provides notifications when it's time to change the engine oil, air filter, oil filter, etc.
25) Wikidroid Use Wikipedia often? Wikidroid formats Wikipedia articles for your device with a sleek interface. It even includes voice search and bookmarks.